Flickering light induces visual hallucinations in human observers. Despite a long history of the phenomenon, little is known about the dependence of flicker-induced subjective impressions on the flicker frequency. We investigate this question using Ganzfeld stimulation and an experimental paradigm combining a continuous frequency scan with a focus on re-occurring, whole percepts. On the single-subject level, we find a high degree of frequency stability of percepts. To generalize across subjects, we apply two rating systems, a set of complex percept (...) classes derived from subjects’ reports and an enumeration of elementary percept features, and determine distributions of occurrences over flicker frequency. We observe a stronger frequency specificity for complex percept classes than elementary percept features. Comparing the similarity relations among percept categories to those among frequency profiles, we observe that though percepts are preferentially induced by particular frequencies, the frequency does not unambiguously determine the experienced percept. (shrink)

In lectures and writings in the decades following the publication of Studies in Ethnomethodology [1967], Harold Garfinkel, the founder of ethnomethodology, developed what he called a “misreading” of the phenomenological writings of Aron Gurwitsch, Maurice Merleau-Ponty and others. Garfinkel’s “misreading” included a selective and creative treatment of themes that Gurwitsch drew from Gestalt psychology, such as figure-ground, Gestalt contexture, and the phenomenal field. Rather than identifying these themes with visual perception demonstrated with picture-puzzles (for example, of animals hidden in (...) foliage) and line drawings of reversible figures, Garfinkel used them to demonstrate praxeological and interactional phenomena: organizations of embodied activity that constitute fields of collective action. Phenomenal fields, for Garfinkel, are formed through embodied work performed in concert with the actions of others. Although Harvey Sacks, the founder of Conversation Analysis, did not explicitly mention Gurwitsch, phenomenology or Gestalt psychology in his writings and transcribed lectures, some of his writings on the sequential organization of conversation seem informed, if only indirectly through his relationship with Garfinkel, by Gurwitsch’s treatment of visual and auditory phenomena. Both Garfinkel and Sacks devised innovative ways to transpose Gestalt phenomena from perceptual psychology to social formations. (shrink)

Our visual system can process information at both conscious and unconscious levels. Understanding the factors that control whether a stimulus reaches our awareness, and the fate of those stimuli that remain at an unconscious level, are the major challenges of brain science in the new millennium. Since its publication in 1984, Visual Masking has established itself as a classic text in the field of cognitive psychology. In the years since, there have been considerable advances in the cognitive neurosciences, (...) and a growth of interest in the topic of consciousness, and the time is ripe for a new edition of this text. Where most current approaches to the study of visual consciousness adopt a 'steady-state' view, the approach presented in this book explores its dynamic properties. This new edition uses the technique of visual masking to explore temporal aspects of conscious and unconscious processes down to a resolution in the millisecond range. The 'time slices' through conscious and unconscious vision revealed by the visual masking technique can shed light on both normal and abnormal operations in the brain. The main focus of this book is on the microgenesis of visual form and pattern perception - microgenesis referring to the processes occurring in the visual system from the time of stimulus presentation on the retinae to the time, a few hundred milliseconds later, of its registration at conscious or unconscious perceptual and behavioural levels. The book takes a highly integrative approach by presenting microgenesis within a broad context encompassing visuo-temporal phenomena, attention, and consciousness. (shrink)

Traditional explanations of multistable visual phenomena (e.g. ambiguous figures, perceptual rivalry) suggest that the basis for spontaneous reversals in perception lies in antagonistic connectivity within the visual system. In this review, we suggest an alternative, albeit speculative, explanation for visual multistability – that spontaneous alternations reflect responses to active, programmed events initiated by brain areas that integrate sensory and non-sensory information to coordinate a diversity of behaviors. Much evidence suggests that perceptual reversals are themselves more closely (...) related to the expression of a behavior than to passive sensory responses: (1) they are initiated spontaneously, often voluntarily, and are influenced by subjective variables such as attention and mood; (2) the alternation process is greatly facilitated with practice and compromised by lesions in non-visual cortical areas; (3) the alternation process has temporal dynamics similar to those of spontaneously initiated behaviors; (4) functional imaging reveals that brain areas associated with a variety of cognitive behaviors are specifically activated when vision becomes unstable. In this scheme, reorganizations of activity throughout the visual cortex, concurrent with perceptual reversals, are initiated by higher, largely non-sensory brain centers. Such direct intervention in the processing of the sensory input by brain structures associated with planning and motor programming might serve an important role in perceptual organization, particularly in aspects related to selective attention. (shrink)

Traditional explanations of multistable visual phenomena (e.g. ambiguous figures, perceptual rivalry) suggest that the basis for spontaneous reversals in perception lies in antagonistic connectivity within the visual system. In this review, we suggest an alternative, albeit speculative. explanation for visual multistability - that spontaneous alternations reflect responses to active, programmed events initiated by brain areas that integrate sensory and non-sensory information to coordinate a diversity of behaviors. Much evidence suggests that perceptual reversals are themselves more closely (...) related to the expression of a behavior than to passive sensory responses: (1) they are initiated spontaneously, often voluntarily, and are influenced by subjective variables such as attention and mood; (2) the alternation process is greatly facilitated with practice and compromised by lesions in non- visual cortical areas; (3) the alternation process has temporal dynamics similar to those of spontaneously initiated behaviors; (4) functional imaging reveals that brain areas associated with a variety of cognitive behaviors are specifically activated when vision becomes unstable. In this scheme, reorganizations of activity throughout the visual cortex, concurrent with perceptual reversals, are initiated by higher, largely non- sensory brain centers. Such direct intervention In the processing of the sensory input by brain structures associated with planning and motor programming might serve an important role in perceptual organization, particularly in aspects related to selective attention. (shrink)

The Perception and Attention Deficit (PAD) model of visual hallucinations is as limited in generality as other models. It does, however, raise an interesting hypothesis on the role of attentional biases among proto-objects. The prediction that neither impaired attention nor impaired sensory activation alone will produce hallucinations should be addressed in future studies by analysing partial correlations between putative causes and hallucinatory effects.

A fundamental characteristic of human visual perception is the ability to group together disparate elements in a scene and treat them as a single unit. The mechanisms by which humans create such groupings remain unknown, but grouping seems to play an important role in a wide variety of visual phenomena. I propose a neural model of grouping; through top-down control of its circuits, the model implements a grouping strategy that involves both a connection strategy (which elements to (...) connect) and a selection strategy (spatiotemporal properties of a selection signal that segments target elements to facilitate identification). With computer simulations I explain how the circuits work and show how they can account for a wide variety of Gestalt principles of perceptual grouping. Additionally, I extend the model so that it can simulate visual search tasks. I show that when the model uses particular grouping strategies, simulated results closely match empirical results from replication experiments of three visual search tasks. In these experiments, perceptual grouping was induced by proximity and shape similarity (Palmer & Beck, 2007), by the spacing of irrelevant distractors and size similarity (Vickery, 2008), or by the proximity of dots and the proximity and shape similarity of line figures (Trick & Enns, 1997). Thus, I show that the model accounts for a variety of grouping effects and indicates which grouping strategies were likely used to promote performance in three visual search tasks. (shrink)

A fundamental question in the psychological sciences is the degree to which culture shapes core cognitive processes — perhaps none more foundational than how we perceive the world around us. A dramatic and oft-cited “case study” of culture’s power in this regard is the Müller-Lyer illusion, which depicts two lines of equal length but with arrowheads pointing either inward or outward, creating the illusion that one line is longer than the other. According to a line of research stretching back over (...) a century, depending on the society you were raised in (and how much carpentry you were exposed to), you may not see the illusion at all — an ambitious and influential research program motivating claims that seemingly basic aspects of visual processing may actually be “culturally evolved byproducts”. This Cultural Byproduct Hypothesis bears on foundational issues in the science, philosophy, and sociology of psychology, and remains popular today. Yet, here we argue that it is almost certainly false. We synthesize evidence from diverse fields which demonstrate that: (1) the illusion is not limited to humans, appearing in non-human animals from diverse ecologies; (2) the statistics of natural scenes are sufficient to capture the illusion; (3) the illusion does not require straight lines typical of carpentry (nor even any lines at all); (4) the illusion arises in sense modalities other than vision; and (5) the illusion arises even in congenitally blind subjects. Moreover, by reexamining historical data and ethnographic descriptions from the original case studies, we show that the evidence for cultural variation and its correlation with key cultural variables is in fact highly inconsistent, beset by questionable research practices, and misreported by later discussions. Together, these considerations undermine the most popular and dramatic example of cultural influence on perception. We further extend our case beyond this phenomenon, showing that many of these considerations apply to other visual illusions as well, including similarly implicated visual phenomena such as the Ebbinghaus, Ponzo, Poggendorf, and Horizontal-Vertical illusions. We conclude by outlining future approaches to cross-cultural research on perception, and we also point to other potential sources of cultural variation in visual processing. (shrink)

In many fields of biology, both the phenomena to be explained and the mechanisms proposed to explain them are commonly presented in diagrams. Our interest is in how scientists construct such diagrams. Researchers begin with evidence, typically developed experimentally and presented in data graphs. To arrive at a robust diagram of the phenomenon or the mechanism, they must integrate a variety of data to construct a single, coherent representation. This process often begins as the researchers create a first sketch, (...) and it continues over an extended period as they revise the sketch until they arrive at a diagram they find acceptable. We illustrate this process by examining the sketches developed in the course of two research projects directed at understanding the generation of circadian rhythms in cyanobacteria. One identified a new aspect of the phenomenon itself, whereas the other aimed to develop a new mechanistic account. In both cases, the research resulted in a paper in which the conclusion was presented in a diagram that the authors deemed adequate to convey it. These diagrams violate some of the normative “cognitive design principles” advanced by cognitive scientists as constraints on successful visual communication. We suggest that scientists’ sketching is instead governed by norms of success that are broadly explanatory: conveying the phenomenon or mechanism. (shrink)

To what extent does perceptual language reflect universals of experience and cognition, and to what extent is it shaped by particular cultural preoccupations? This paper investigates the universality~relativity of perceptual language by examining the use of basic perception terms in spontaneous conversation across 13 diverse languages and cultures. We analyze the frequency of perception words to test two universalist hypotheses: that sight is always a dominant sense, and that the relative ranking of the senses will be the same across different (...) cultures. We find that references to sight outstrip references to the other senses, suggesting a pan-human preoccupation with visual phenomena. However, the relative frequency of the other senses was found to vary cross-linguistically. Cultural relativity was conspicuous as exemplified by the high ranking of smell in Semai, an Aslian language. Together these results suggest a place for both universal constraints and cultural shaping of the language of perception. (shrink)

The two contrasting theoretical approaches to visual perception, the constructivist and the ecological, are briefly presented and illustrated through their analyses of space and size perception. Earlier calls for their reconciliation and unification are reviewed. Neurophysiological, neuropsychological, and psychophysical evidence for the existence of two quite distinct visual systems, the ventral and the dorsal, is presented. These two perceptual systems differ in their functions; the ventral system's central function is that of identification, while the dorsal system is mainly (...) engaged in the visual control of motor behavior. The strong parallels between the ecological approach and the functioning of the dorsal system, and between the constructivist approach and the functioning of the ventral system are noted. It is also shown that the experimental paradigms used by the proponents of these two approaches match the functions of the respective visual systems. A dual-process approach to visual perception emerges from this analysis, with the ecological-dorsal process transpiring mainly without conscious awareness, while the constructivist-ventral process is normally conscious. Some implications of this dual-process approach to visual-perceptual phenomena are presented, with emphasis on space perception. Key Words: constructivist; dual-process approach; ecological; size perception; space perception; two visual systems; visual perception theories. (shrink)

Can we find different means of communicative visual solutions to aid societies in the development of multicultural global communities? This means not revolving only around a particular language or even human language, but rather the concept and structure of communication. This transforms any kind of sign, body gesture or visual element into a method of communication, not simple phenomena. The aim of the research is to use media art and new technology to establish a better (wide) (...) class='Hi'>visual communicative language in multicultural societies and provide a solid bridge between east and west, through in-depth visual/technological experimentation, seeking a transcultural visual solution to the problem of visual integration. Can any perceivable phenomenon become a conveyor of meaning? While language is based very much on common agreements, the way each of us responds to a message can be entirely different. Communication therefore creates diversity from uniformity: the idea of mixing setups of humans and machines (robots, computers, etc.) that are somehow able to communicate. The communication would give rise to some sort of choreography of movements that is synchronized because of the communication but diverse because of different responses to the communication. (shrink)

Some philosophers—for example, Husserl, Alva Noë and Susanna Siegel—have claimed that the contents of visual sensations standardly include references to the later visual episodes that one would have under certain conditions. The current paper claims that there are no good reasons for accepting that view. Instead, it is argued that the conscious phenomena which have been cited as manifesting the presence within visual contents of references to ways that things would look in the course of later (...) visual sensations are better explained in another manner: in terms of references within the contents of ordinary visual sensations to ways that things actually then look from various perspectives. (shrink)

Autoscopic phenomena are complex experiences that include the visual illusory reduplication of one’s own body. From a phenomenological point of view, we can distinguish three conditions: autoscopic hallucinations, heautoscopy, and out-of-body experiences. The dysfunctional pattern involves multisensory disintegration of personal and extrapersonal space perception. The etiology, generally either neurological or psychiatric, is different. Also, the hallucination of Self and own body image is present during dreams and differs according to sleep stage. Specifically, the representation of the Self in (...) REM dreams is frequently similar to the perception of Self in wakefulness, whereas in NREM dreams, a greater polymorphism of Self and own body representation is observed. The parallels between autoscopic phenomena in pathological cases and the Self-hallucination in dreams will be discussed to further the understanding of the particular states of self awareness, especially the complex integration of different memory sources in Self and body representation. (shrink)

The major theoretical framework relative to the perception of illusory figures is reviewed and discussed in the attempt to provide a unifying explanatory account for these phenomena.

Research on visual attention has uncovered significant anomalies, and some traditional methods may have inadvertently probed peripheral vision rather than attention. Vision science needs to rethink visual attention from the ground up. To facilitate this, for a year I banned the word “attention” in my lab. This constraint promoted a more precise discussion of attention-related phenomena, capacity limits, and mechanisms. The insights gained lead me to challenge attributing to “attention” those phenomena that can be better explained (...) by perceptual processes, are predictable by an ideal observer model, or that otherwise may not require an additional mechanism. I enumerate a set of critical phenomena in need of explanation. Finally, I propose a unifying theory in which all perception results from performing a task, and tasks face a limit on complexity. (shrink)

In this paper, I characterize visual epistemic representations as concrete two- or three-dimensional tools for conveying information about aspects of their target systems or phenomena of interest. I outline two features of successful visual epistemic representation: that the vehicle of representation contain sufficiently accurate information about the phenomenon of interest for the user’s purpose, and that it convey this information to the user in a manner that makes it readily available to her. I argue that actual epistemic (...) representation may involve tradeoffs between these and is successful to the extent that they are present. (shrink)

This paper argues that a theory of situated vision, suited for the dual purposes of object recognition and the control of action, will have to provide something more than a system that constructs a conceptual representation from visual stimuli: it will also need to provide a special kind of direct (preconceptual, unmediated) connection between elements of a visual representation and certain elements in the world. Like natural language demonstratives (such as `this' or `that') this direct connection allows entities (...) to be referred to without being categorized or conceptualized. Several reasons are given for why we need such a preconcep- tual mechanism which individuates and keeps track of several individual objects in the world. One is that early vision must pick out and compute the relation among several individual objects while ignoring their properties. Another is that incrementally computing and updating representations of a dynamic scene requires keeping track of token individuals despite changes in their properties or locations. It is then noted that a mechanism meeting these requirements has already been proposed in order to account for a number of disparate empiri- cal phenomena, including subitizing, search-subset selection and multiple object tracking (Pylyshyn et al., Canadian Journal of Experimental Psychology 48(2) (1994) 260). This mechanism, called a visual index or FINST, is brie. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Visual Aesthetic ExperienceElisa Steenberg, Independent ScholarMan can shift his attitude to the surrounding world into an experience of its visual appearance. He perceives colors, lines, shapes, etc.—at times denoted as form. Furthermore, these phenomena may be experienced as having various properties. A color may be experienced as warm or cold, as cheerful or somber; a line as soft or hard, as merry or aggressive; a shape (...) as light or heavy. Moreover, such experiences may include pleasure or displeasure, implying that what is experienced is liked or disliked. The individual has a preference value experience. This should not be confounded with an evaluation, a value judgment, which requires cognitive activity and a comparison. The experience described I designate a visual aesthetic experience.Research into processes in the brain may offer explanations of the neurological antecedents to the visual aesthetic experience. To see a color as cold or warm may depend on sense-interrelating processes. To experience a color or line as cheerful, somber, etc., might be explained as due to simultaneous processes in the regions of the brain that are the mainsprings of emotions. The preference valuations might be due to processes in the brain's so-called primary reward-aversion center. It seems most likely that future brain research, with the help of such techniques as PET scanning (Positron Emission Tomography) or MRI (Magnetic Resonance Imaging)—what has been called "windows into the human brain"—may offer explanations regarding the physiological and biochemical processes that happen when our attitude to the world around us is shifted into what is here designated a visual aesthetic experience.1When did man first evince visual aesthetic experiences and when do they first occur in an individual's life? Certain anthropologists assert that positive visual aesthetic experiences first occurred when man was able to experience form as symmetrical and balanced, colors as bright and possibly shiny. This they claim is due to balance and order being a fundamental condition in man's life, and preferences for bright colors they consider due to man being a daylight creature who feels insecure in darkness.2 We know that so-called primitive people and young children like symmetric patterns and bright colors. The child reaches out for light red and yellow objects rather than for dark and black ones. With increasing age, though, the child's [End Page 89] visual preferences usually change, and this occurs mainly within the framework of his or her manmade surroundings. The child becomes accustomed to seeing certain objects while feeling pleasure and thus comes to appreciate their appearance. However, such experiences are rather vague before the child reaches the age when its personality is formed. Then especially girls often develop a keen interest in the appearance of objects around them.A general survey among adults shows that there are considerable varieties in individuals' inclinations for visual aesthetic experiences. There are those who have them rather seldom. Their attitudes to the surrounding world are primarily cognitive. Their attentions are focused on meanings, the "what" not the "how," in order to understand and to cope with what they see. On the other hand, there are individuals who most frequently hold an aesthetic attitude to their surroundings. They pay attention to shapes, colors, and color combinations of all kinds of objects, natural or manmade. They choose their clothes and their home furnishings under careful aesthetic considerations. This inclination may possibly be claimed to be due to an innate disposition for holding visual aesthetic attitudes, to be compared with, for example, an individual's innate musicality. However, it is undoubtedly also due to certain social circumstances.Visual aesthetic experiences are denoted taste manifestations. As such they may be investigated not only as to their occurrences and changes in an individual's life but also as a changing sociocultural phenomenon.3Verbalizing the Visual Aesthetic ExperienceThe psychic content of a visual aesthetic experience may be revealed to other individuals by application of aesthetic property terms to the appearance of objects. The terms are either what is here called descriptive or they are value terms. Examples of descriptive aesthetic terms are graceful, garish, gaudy, clumsy, elegant, dainty, vivid, flamboyant, etc. These terms may... (shrink)

The image is the raw material of the twenty-first century. Images infiltrate all social and cultural spaces. Its digital-mediated realities drive communication, industry and knowledge. Images saturate life and adolescent learners are familiar with the participatory nature of image production and its social, educational and personal communicative realities. Vision and visibility, seeing and being now dominate how we inter-subjectively recognise ourselves and perform our world. We also find our aesthetic and embodied self increasingly constituted within imaging acts that are relational. (...) Visual culture may have colonised the self and learning, but imagination is without borders. The current pictorial turn opens possibilities to explore truth in flux through visual artistic acts. This article embeds Deleuzian method, which is one of intuitions, going beyond the actual, or our limited forms of representing life, to recognising that life has future imaginative potential forms and is always becoming. The article discusses an arts-based inquiry project for gifted artist visualiser/learners at an Australian regional university who are given broad topics on science phenomena and asked to give them expression. It suggests that pedagogies of the visual with their performative acts can prise open curriculum where an art-science interchange between two disciplines is made difficult by the current siloed nature of curriculum knowledge. Drawing on an analysis of Anika’s and Joel’s artworks and visual diaries it aims to reveal how their learning events dwell and are performed in aesthetic borderlands and how visual pedagogies forge new fluid visual borderlands and new learning. (shrink)

Standard models of visual perception hold that vision is an inferential or interpretative process. Such models are said to be superior to competing, non-inferential views in explanatory power. In particular, they are said to be capable of explaining a number of otherwise mysterious, visual phenomena such as multi-stable perception. Multi-stable perception paradigmatically occurs in the presence of ambiguous figures, single images that can give rise to two or more distinct percepts. Different interpretations are said to produce the (...) different percepts. In this paper, I argue that a non-inferential account of visual perception is just as capable of explaining multi-stable perception. I propose an embedded understanding of vision, and show how the embedded account can, after properly qualifying them, use the explanatory resources of the inferential view to explain just what such a view explains. (shrink)

Experimental phenomenology has demonstrated that perception is much richer than stimulus. As is seen in color perception, one and the same stimulus provides more than several modes of appearance or perceptual dimensions. Similarly, there are various perceptual dimensions in form perception. Even a simple geometrical figure inducing visual illusion gives not only perceptual impressions of size, shape, slant, depth, and orientation, but also affective or aesthetic impressions. The present study reviews our experimental phenomenological work on visual illusion and (...) experimental aesthetics, and examines how aesthetic preference is influenced by stimulus factors determining visual illusions including anomalous surface and transparency as well as geometrical illusion. Along with line figures producing geometrical illusions, illusory surface figures inducing neon color spreading and transparency effects were used as test patterns. Participants made both of psychophysical judgments and of aesthetic judgments for the same test pattern. Both of geometrical illusions and aesthetic preferences were found to change similarly as a function of stimulus variables such as the number of filling lines and the size ratio of the inner and outer figural components. Also, following specific stimulus variables such as lightness contrast ratio and spatial interval between inducing figural elements (so called ``packmen''), strong effects of color spreading and transparency were accompanied with strong preferences. It seems that the paradigm to investigate aesthetic phenomena along with perceptual dimensions is useful to bridge the gap between experimental phenomenology and experimental aesthetics. (shrink)

This paper presents a study of the generation, manipulation and use of visual representations in different episodes of scientific discovery. The study identifies a common set of transformations of visual representations underlying the distinctive methods and imagery of different scientific fields. The existence of common features behind the diversity of visual representations suggests a common dynamical structure for visual thinking, showing how visual representations facilitate cognitive processes such as pattern-matching and visual inference through the (...) use of tools, technologies and other cultural resources. This dynamical model suggests a way of theorizing the interaction of cognitive, socio-cultural and technological aspects of science without losing sight of the essential contribution each makes to the processes of discovery. Whereas scientific work is often construed epistemically, as having the aim of improving the fit between theories and phenomena or culturally given notions of what counts as reality, this study shows that scientists use transformations to modify visual representations in ways that achieve other kinds of match: between a representation and the cognitive demands of a task or between an emerging representation and the social need to communicate and negotiate new meanings in a context of culturally embedded conventions. By showing how images connect each of the overlapping contexts of scientific work the proposed model negotiates the sometimes contested boundary between cognitive and social aspects of science. (shrink)

There is a traditional scepticism about whether the world "out there" really is as we perceive it. A new breed of hyper-sceptics now challenges whether we even have the perceptual experience we think we have. According to these writers, perceptual consciousness is a kind of false consciousness. This view grows out of the discovery of such phenomena as change blindness and inattentional blindness, which show that we can all be quite blind to changes taking place before our very eyes. (...) Such radical scepticism has acute and widespread implications for the study of perception and consciousness. The writings collected in this volume explore these implications. The contributors are scientists and philosophers at the forefront of this research, and include well-known authors such as psychologists Susan Blackmore and Arien Mack, and philosophers Andy Clark and Daniel Dennett. They have an gift for bringing these paradoxical issues to life and sharing their excitement with the non-specialist. (shrink)

In visual science the term filling-inis used in different ways, which often leads to confusion. This target article presents a taxonomy of perceptual completion phenomena to organize and clarify theoretical and empirical discussion. Examples of boundary completion (illusory contours) and featural completion (color, brightness, motion, texture, and depth) are examined, and single-cell studies relevant to filling-in are reviewed and assessed. Filling-in issues must be understood in relation to theoretical issues about neuralignoring an absencejumping to a conclusionanalytic isomorphismCartesian materialism, (...) a particular neural stage that forms the immediate substrate of perceptual experience enactiveanimatesubpersonal” considerations about internal processing, but rather by considerations about the task of vision at the level of the animal or person interacting with the world. (shrink)

In his 1990s studies of visual humor, Noël Carroll left to “future researchers” the laborious task of developing a “comprehensive and rigorous classification of the phenomena” pertaining to “the sight gag.” Carroll contributed five possible items belonging to such a taxonomy, i. e., “the mutual interference gag”, “mimed metaphors”, “the object analog”, “the switch image” and “the solution gag”. Following the implicit reference to rhetoric built in the very names of some of these items, this article shows how (...) the well-established tropes of classical rhetoric, indeed three hundred of them, can be employed, with a modicum of analogical creativity, in order to address the visual component of comedic sketches, as exemplified by Monty Python’s famous Flying Circus. (shrink)

The article is devoted to the problem of changing stylistic paradigm in the Persian poetry of XVI-XVII centuries and reflection of this process in self-consciousness of outstanding authors of the period. Parallel with preserving stable norms of traditional poetics literary practice demonstrates flexibility and forms new range of popular poetic strategies. New aesthetic criteria if ideal poetic language, expressed with epithet ‘colourful’, appears alongside with criteria of previous period, expressed with epithet ‘sweet’ and step by step gets leadership. Lyric poetry (...) of three famous authors of the period of formation and golden age of Indian style served the object of analyses. The phenomena of visualization of imagery connected with perfect poetic language illustrated by examples of ‘Poet and Poetry’ motifs located in ‘frame text’ in end of the qhazal. These motifs serve one of the regular contexts of author’s name and show author’s attitude to his creation, including stylistic preferences. Refinement of poetic fantasy being declared basic condition of creating perfect poetry described visually as coiling lasso, poetry itself as flourishing garden, fountain or European house decorated with painting. Such characteristic of word creation has analogies in the works of Baroque style theorist Giambattista Marino. (shrink)

Sensation is the reflection of the brain on the individual attributes of objective things that directly act on the sense organs. Feeling is the most elementary cognitive process and the simplest psychological phenomenon. Vision is a kind of sense, and sense is produced by objective things acting on the sense organs. But at present, it is rare to analyze interior design exhibition from the perspective of visual psychology, an emerging science, as an interdisciplinary attempt, only in interior design research. (...) Therefore, the study of sensory process should start from its external stimuli, in order to first understand how it acts on the sensory organs to produce sensory phenomena. This paper mainly studies the visual performance of psychological factors in interior design under the background of artificial intelligence. This paper proposes a K-means clustering algorithm and a localization algorithm fused with visual and inertial navigation. The distance thresholds corresponding to the SIFT feature descriptors of threshold T1, 128D, 96D, 64D, and 32D are 170, 160, 150, and 90, respectively. This verifies that the candidate image with the highest number of matching points is considered the best matching image. (shrink)

According to Roderick Chisholm, one distinctive characteristic of mental phenomena is that they relate to their objects "under an aspect'": Lois Lane admires the one object that is both Superman and Clark Kent as "Superman" but not as "Clark Kent". This paper argues that visual attention exhibits no such characteristic. This suggests that attention is an exceptional mental phenomenon, and understanding it may provide insight into mind-body or mind- world relations.

Philosophers and psychologists alike have argued recently that relatively abstract beliefs or cognitive categories like those regarding race can influence the perceptual experience of relatively low-level visual features like color or lightness. Some of the proposed best empirical evidence for this claim comes from a series of experiments in which White faces were consistently judged as lighter than equiluminant Black faces, even for racially ambiguous faces that were labeled ‘White’ as opposed to ‘Black’ (Levin and Banaji 2006). The latter (...) result is considered especially indicative of cognitive penetration, based on the reasoning that the relevant distortions were a function of lexical labeling, and hence the effect must have been mediated by categorization at the cognitive level. I argue that this reasoning is flawed, and that the assumptions on which it relies are questionable on both empirical and theoretical grounds. I propose an alternative, low-level explanation of the phenomena, which I argue is empirically more plausible and abductively preferable to the cognitive-penetration account. The upshot is that cognitively impenetrable perceptual systems may be psychologically more plastic and hence philosophically more significant than is nowadays commonly assumed. (shrink)

This article offers a philosophical account of a range of urban phenomena that are integral to the visual fabric of the modern city and, at the same time, external to the visual order administered by the city’s rulers. Explaining why the common terms of “graffiti” and “street art” are too narrow for discussing the plurality of the illicit visual forms that populate the city’s space, I coin the alternative term “streetography” and aim at a new understanding (...) of its visual efficacy. This is done by showing that the key for deciphering the streetograph’s unique visuality is its form of embeddedness in the street and, in a corollary manner, the form of visual experience—the kinds of viewing—that the street opens for the urban viewer.Streetographs always operate within the city’s given visual order and as such the question of their efficacy is addressed here in terms of the streetograph’s relationship to that hegemonic visual rule whose basic traits are also clarified. Developing an understanding of this relationship, the article thus addresses the following questions: What kind of resistance can streetographs provide to the kind of optics that governs the modern urban space? Can streetographs evoke an alternative kind of spectatorship that disrupts the sovereign’s imagination? And, more specifically, in an epoch in which streetographs are regularly absorbed into capitalist aesthetics—advertising, cinema, social media—how can they allow us to rethink the possibility of resisting the measure of a global capitalist visual system? (shrink)

There are two approaches that dominate contemporary opera performances. The first may be characterised as producing a subtle, aesthetic and stylistic means of expression. The second runs up visual, interpretation and content means to their maximum expressivity and the audience is exposed to violence, sex and experience disgust. This paper analyses specific productions by renowned European theatre and opera directors, in order to shed light on the way in which opera directors cope with the threat of terrorism, sexual violence, (...) and the impact of the mass media upon the moral belief system of modern man. Within the context of the bold productions of European theatre-makers Slovak opera theatre seems conservative, gravitating towards the aesthetic aspect of opera. (shrink)

Context: In sciences of the mind, cognitive phenomena are typically investigated with the use of psychological tasks. These usually represent highly constrained environments that isolate and make ….

How does visual imagination differ from visual perceptual experience? And how should we describe experiences of visual imagery? Moreover how can people who have visual imagery convey what it is like to have it to those who have never had it – congenital aphantisics? This paper addresses these questions using examples of illusions and other perceptual phenomena to hone in on the answers.

Recent research exploring phenomena such as change blindness, inattentional blindness, attentional blink and repetition blindness has revealed a number of counterintuitive ways in which apparently salient visual stimuli often go unnoticed. In fact, large majorities of subjects sometimes predict that they would detect visual changes that actually are rarely noticed, suggesting that people have strong beliefs about visual experience that are demonstrably incorrect. However, for other kinds of visual metacognition, such as picture memory, people underpredict (...) performance. This paper describes two experiments demonstrating that both these overpredictions of change detection, and underpredictions of visual memory can be linked with intuitions about the visual experience of different kinds of agents. Subjects predicted more visual change detection and poorer visual memory for mechanical representational systems when these were anthropomorphized using intentional terminology. (shrink)

It is commonly believed that human perceptual experiences can be, and usually are, multimodal. What is more, a stronger thesis is often proposed that some perceptual multimodal characters cannot be described simply as a conjunction of unimodal phenomenal elements. If it is the case, then a question arises: what is the additional mode of combination that is required to adequately describe the phenomenal structure of multimodal experiences? The paper investigates what types of audio–visual experiences have phenomenal character that cannot (...) be analysed as a mere conjunction of visual and auditory elements; and how can we properly characterise the required, additional mode of perceptual combination. Three main modes of combination are considered: instantiation, parthood, and grouping. It is argued that some phenomena involving intermodal relations, like spatial and temporal ventriloquism, can be analysed in terms of audio–visual, perceptual grouping. On the other hand, cases of intermodal binding need a different treatment. Experiences involving audio–visual binding should be analysed as experiences presenting objects or events which instantiate, or which have a proper part instantiating, both visually and auditorily determined properties. (shrink)

In this paper I explore a brand of scepticism about perceptual experience that takes its start from recent work in psychology and philosophy of mind on change blindness and related phenomena. I argue that the new scepticism rests on a problematic phenomenology of perceptual experience. I then consider a strengthened version of the sceptical challenge that seems to be immune to this criticism. This strengthened sceptical challenge formulates what I call the problem of perceptual presence. I show how this (...) problem can be addressed by drawing on an enactive or sensorimotor approach to perceptual consciousness. Our experience of environmental detail consists in our access to that detail thanks to our possession of practical knowledge of the way in which what we do and sensory stimulation depend on each other. (shrink)

Although the sensorimotor account is a significant step forward, it cannot explain experiences of entoptic phenomena that violate normal sensorimotor contingencies but nonetheless are perceived as visual. Nervous system structure limits how they can be interpreted. Neurophysiology, combined with a sensorimotor theory, can account for space constancy by denying the existence of permanent representations of states that must be corrected or updated.

Diaristic, mixed notes on: John Ruskin's The Poetry of Architecture (1837) and Modern Painters (1885); Caravaggio, Victorian Aesthetes, G.K. Chesterton, and Tacita Dean; Jay Fellows' Ruskin’s Maze: Mastery and Madness in His Art (1981); Slavoj Žižek at Jack Tilton Gallery, New York, New York, USA, April 23, 2009, “Architectural Parallax: Spandrels and Other Phenomena of Class Struggle”; “Titian, Tintoretto, Veronese: Rivals in Renaissance Venice”, Museum of Fine Arts, Boston, Massachusetts, USA, March 15-August 16, 2009; Janet Harbord, Chris Marker: La (...) Jetée (2009); The Politics of the Envelope, Princeton Envelope Group (PEG), ARC504, Princeton School of Architecture, Princeton, New Jersey, USA, Friday, May 8, 2009; Rhode Island School of Design, Degree Project Reviews, Division of Architecture & Design, Providence, Rhode Island, USA, May 16, 2009; etc. (shrink)

The goal of this paper is to challenge the rather insouciant attitude that many investigators seem to adopt when they go about describing the items and events in their " visual fields". There are at least three distinct categories of interpretation of what these reports might mean, and only under one of those categories do those reports have anything resembling an observational character. The others demand substantive revisions in one's beliefs about what one sees. The ur-concept of a " (...) visual field" is that of the "sum of things seen", but one can interpret the latter in very different ways. The first is the "field of view", or the sum of physical things seen. The second is an array of visual impressions, whose spatial relations are distinct from those of physical phenomena in front of the eyes. The third is an intentional object: the world as it is represented visually. These three categories are described, and various locutions of vision science--such as "optic array", "retinocentric space", " visual geometry", "virtual object" and others--are analyzed and variously located within them. Finally, a recent argument purporting to necessitate the existence of a version two visual field is examined and shown wanting. (shrink)

A cluster of experiments on “Change Blindness”, “Inattentional Blindness” and associated phenomena appear to demonstrate extremely counter intuitive results. According to one plausible characterisation, these results show that we consciously take in far less of the visual world than it seems we are aware of. It is worth briefly summarising the results of two recent sets of experiments, in order to give a flavour of this work. In ‘Gorillas in our Midst’ (Simons, D. and Chabris, C., Perception, 1999, (...) 28), subjects were asked to perform a task that involved watching a video of a casual basketball game that lasts for about a minute. The task involves counting the number of consecutive passes between members of the one of the teams. While the basketball is being thrown from player to player, something unexpected takes place: a person dressed in a black gorilla-suit walks through the play, stops briefly in the centre of the picture, thumps his chest, and then walks off. Although most subjects correctly record the number of passes made by the team, at least half of these subjects fail to notice the gorilla-suited interloper, who is visible for about nine seconds. When shown the video sequence a second time they are amazed to observe what they had previously overlooked. (shrink)

It seems obvious that signs in visual art and musical notation are static carriers of visual and acoustic information. Both types of sign, however, represent dynamic processes. In real space-time, there exists no static visible thing or static audible sound. The sources of visible or audible information are dynamic – i.e. complementary substantialenergetic-informational – entities extending in space-time. The same is true of an artificial or organic receiver and processor of visual or audible information. Reality and semiosis (...) – to be, to be perceived, and to be understood or to communicate – are dynamic processes. From a semiotic point of view, thus, pictures, photographic or artistic sign structures can’t be icons – in any case, if icons in a Peirceian manner are understood as signs representing objects for an interpretant by similarity . Similarity between icon and object is not a static precondition but a dynamic result of visual semiosis, i.e. of categorizing. Seeing something or hearing something is, as a consequence, not an “intuitive” or instantaneous Gestalt shift between representamen and object ongoing in an interpretant. And so, according to Fernande SaintMartin 1990: “visual semiotics … has to adopt an epistemology which is more in agreement with the dynamics of observed phenomena. It will recognize that matter is not inertness, but energy.” If the material carrier of semiosis, the representamen, already is to be understood as energy or dynamic process, all the more the whole complementary triadic sign-relation – object-representamen-interpretant – has to be understood as energetic information flow. This is being recognized in the transition from naturalistic, i.e. reproducing or mapping art, to modern, i.e. processing or interpreting/transducing art. Paul Klee 1990 for example says about the semiotic function of visual art: “Art doesn’t reproduce the visible but makes visible” . And he correlates the artistic activity of visualizing with the primordial, cosmogonic process of formation: “Reduced to the primordial process of formation, to creation, the process of cell division emerges” . Visual artistic semiosis is, thus, obviously to be understood as the process of emerging dynamic sign structures. It is the skill of the painter that makes the static results of dynamic semiosis “readable” for the viewer as signs – lines and surfaces - of the dynamic visual meaning of the picture. (shrink)