Psychophysical scaling models of the form R = f, with R the response and I some intensity of an attribute, all assume that people judge the amounts of an attribute. With simple biases excepted, most also assume that judgments are independent of space, time, and features of the situation other than the one being judged. Many data support these ideas: Magnitude estimations of brightness increase with luminance. Nevertheless, I argue that the general model is wrong. The stabilized retinal image literature (...) shows that nothing is seen if light does not change over time. The classification literature shows that dimensions often combine to produce emergent properties that cannot be described by the elements in the stimulus. These and other effects cannot be adjusted for by simply adding variables to the general model because some factors do not combine linearly. The proposed alternative is that people initially judge the entire stimulus – the object in terms of its environment. This agrees with the constancy literature that shows that objects and their attributes are identified through their relations to other aspects of the scene. That the environment determines judgments is masked in scaling studies where the standard procedure is to hold context constant. In a typical brightness study the essential stimulus might be the intensity of the light or a difference between the light and the background. The two are perfectly confounded. This issue is examined in the case of audition. Judgments of the loudness of a tone depend on how much that tone differs from the previous tone in both pitch and loudness. To judge loudness people first seem to process the stimulus object in terms of differences between it and other aspects in the situation; only then do they assess the feature of interest. Psychophysical judgments will therefore be better interpreted by theories of attention that are based in biology or psychology than those that are based in classical physics. (shrink)

In Fechner's psychophysics, the 'mental' and the 'physical' were conceived as two phenomenal domains, connected by functional relations, not as two ontologically different realms. We follow the path from Fechner's foundational ideas and Mach's radical programme of a unitary science to later approaches to primary, psychophysically neutral experience (phenomenology, protophysics). We propose an 'integral psychophysics' as a mathematical study of law-like, invariant structures of primary experience. This approach is illustrated by a reinterpretation of psychophysical experiments in terms of (...) perceptual situations involving a constructed apparatus and an instructed subject. The problematic notion of 'measurement of sensation' is thus eliminated: 'sensations' are merely indices for classes of perceptually equivalent configurations (states of the apparatus) specified by the instruction. The locus of the measured is in the inter-subjectively shared, communicable world—not inside the subject's mind. Finally we discuss the role of integral psychophysics as a scientia prima , logically and methodically preceding physics and psychology. (shrink)

This paper develops a new argument from consciousness to theism: the argument from psychophysical harmony. Roughly, psychophysical harmony consists in the fact that phenomenal states are correlated with physical states and with one another in strikingly fortunate ways. For example, phenomenal states are correlated with behavior and functioning that is justified or rationalized by those very phenomenal states, and phenomenal states are correlated with verbal reports and judgments that are made true by those very phenomenal states. We argue that psychophysical (...) harmony is strong evidence for theism (or, at least, strong evidence against atheism in its standard naturalistic form). (shrink)

Jaegwon Kim and others have claimed that (strong) psychophysical supervenience entails the reducibility of mental properties to physical properties. I argue that this claim is unwarranted with respect to epistemic (explanatory) reducibility (either of a global or of a local sort), as well as with respect to ontological reducibility. I then attempt to show that a robust version of nonreductive materialism (which I call supervenient token-physicalism) can be defended against the charge that nonreductive materialism leads to epiphenomenalism in failing to (...) account for the causal or explanatory relevance of mental properties. (shrink)

We studied two otherwise normal, synaesthetic subjects who `saw' a speci¢c colour every time they saw a speci¢c number or letter. We conducted four experiments in order to show that this was a genuine perceptual experience rather than merely a memory association. (i)The synaesthetically induced colours could lead to perceptual grouping, even though the inducing numerals or letters did not. (ii)Synaesthetically induced colours were not experienced if the graphemes were presented peripherally. (iii)Roman numerals were ine¡ective: the actual number grapheme was (...) required. (iv)If two graphemes were alternated the induced colours were also seen in alternation. However, colours were no longer experienced if the graphemes were alternated at more than 4 Hz. We propose that grapheme colour synaesthesia arises from `cross-wiring' between the `colour centre' (area V4 or V8)and the `number area', both of which lie in the fusiform gyrus. We also suggest a similar explanation for the representation of metaphors in the brain: hence, the higher incidence of synaesthesia among artists and poets. (shrink)

An approach to implementing variational Bayesian inference in biological systems is considered, under which the thermodynamic free energy of a system directly encodes its variational free energy. In the case of the brain, this assumption places constraints on the neuronal encoding of generative and recognition densities, in particular requiring a stochastic population code. The resulting relationship between thermodynamic and variational free energies is prefigured in mind–brain identity theses in philosophy and in the Gestalt hypothesis of psychophysical isomorphism.

While introspective methods went out of favour with the decline of Titchener’s analytic school, many important questions concern the rehabilitation of introspection in contemporary psychology. Hatfield rightly points out that introspective methods should not be confused with analytic ones, and goes on to describe their “ineliminable role” in perceptual psychology. Here I argue that certain methodological conventions within psychophysics reflect a continued uncertainty over appropriate use of subjects’ perceptual observations and the reliability of their introspective judgements. My first claim (...) is that different psychophysical methods do not rely equally on the introspective capabilities of experimental subjects. I contrast “minimally-introspective” tasks with “introspection-heavy” ones. It is only in the latter, I argue, that introspection can be said to have a non-trivial role in the subjects’ performance. My second claim is that my rough-and-ready distinction maps onto a number of important “dichotomies” in vision science. Not coincidentally, the introspection-heavy categorisation captures many of the tasks typically considered less able to yield useful information regarding the processes underlying visual sensation. (shrink)

People cannot make independent judgements of stimulus attributes and so (Lockhead 1992, p. 551) rather than in terms of stimulus features. The new commentaries here further this statement and also support the observations in the target article that psychophysical scaling methods allow us to measure (1) how context determines judgments and (2) what people remember about prior stimuli.

Research on the effects of the COVID-19 pandemic on same-sex relationships is limited. The present study aimed at analyzing the association between the psychophysical impact of the COVID-19 pandemic and same-sex couples’ conflict, also considering the potential mediating effect of internalized sexual stigma. For this purpose, psychophysical challenges and couples’ conflict during the COVID-19 pandemic, ISS, age, biological sex, sexual orientation, relationship duration, religiosity, involvement in lesbian, gay, and bisexual associations, sexual satisfaction, and interpersonal partner violence were assessed in an (...) Italian sample of 232 LGB people engaged in a same-sex relationship. The results indicated that the psychophysical impact of the COVID-19 pandemic was significantly associated with couples’ conflict, and ISS mediated this relationship. Among the covariates considered, only sexual satisfaction was associated with couples’ conflict. The findings suggest that ISS, over and above the adverse effects of the COVID-19 pandemic on psychophysical health, triggered conflict within same-sex relationships. Studying the role of ISS in various relational and social contexts is important, as ISS may have an adverse effect on the mental health of sexual minority people. We recommend that more efforts be made to improve research on the LGB population during the public health response to the COVID-19 emergency, because the paucity of studies underlines the invisibility of this population in many domains, including the domain of romantic relationships. Implications and directions for future research are discussed. (shrink)

In past and modern psychophysics there are several unresolved methodological and philosophical problems of human and animal perception, including the outstanding question of the relational basis of whole psychophysics. Here the main issue is discussed: if, and to what extent, there are viable bridges between the traditional “gestalt” oriented approaches and the modern perceptual-cognitive perspectives in psychophysics. Thereby the key concept of psychological “frame of reference” is presented by pointing to Hermann Ebbinghaus' geometric-optical illusions, on the one (...) hand, and Max Wertheimer's treatment of the traditional transposition phenomenon, on the other hand. A much-needed theoretical reorientation of future research may help to overcome the philosophical narrowness of present-day human and comparative psychophysics. (shrink)

Cognitive neuroscience constitutes the third phase of development of the field of cognitive psychophysiology since it was established about half a century ago. A critical historical overview is given of this development, focusing on recurring problems that keep frustrating great expectations. It is argued that psychology has to regain its independent status with respect to cognitive neuroscience and should take psychophysical dualism seriously. A constructive quantum physical model for psychophysical interaction is presented, based on a new stochastic interpretation of the (...) quantum potential in the de Broglie–Bohm theory. This model can be applied to analyze cognitive information processing in psychological experiments. It is shown that the quantum potential shares several features with Duns Scotus’ notion of contingent causality. (shrink)

There are two quite distinct ways in which events that we normally think of as “physical” relate in an intimate way to events that we normally think of as “psychological”. One intimate relation occurs in exteroception at the point where events in the world become events as-perceived. The other intimate relationship occurs at the interface of conscious experience with its neural correlates in the brain. The chapter examines each of these relationships and positions them within a dual-aspect, reflexive model of (...) how consciousness relates to the brain and external world. The chapter goes on to provide grounds for viewing mind and nature as fundamentally psychophysical, and examines similar views as well as differences in previously unpublished writings of Wolfgang Pauli, one of the founders of quantum mechanics. (shrink)

Riemer’s recent paper on the perception of time discusses a neglected yet important topic in the psychological literature: the consequences for psychology (and psychophysics) from the ‘anisotropy’ of time. The paper presents an argument that there are unique kinds of challenges for psychophysics from such temporal anisotropy: (a) Challenges because the psychological experience of time has temporal anisotropy and the physical concept of time does not have temporal anisotropy. (b) Challenges for experimental research which are unique to temporal (...) anisotropy. -/- Although it is important to consider temporal anisotropy, I think there are reasons to deny the force of both kinds of challenges. (shrink)

The thesis, typical among dualists, that there are no necessitation relations between events of consciousness and physical events implies that it is prima facie lucky that in our world the apparently existing psychophysical laws usually match events of consciousness and physical events in a “harmonious” way. The lucky psychophysical laws argument concludes that typical dualism amounts to a psychophysical parallelism that is prima facie too improbable to be true. I argue that an anthropic reasoning in the space of possible worlds (...) makes the appearance of a harmonious match situation unsurprising, and that this is all that is needed for the argument to be harmless to a typical dualist. (shrink)

THE PSYCHOPHYSICAL FOUNDATIONS OF POLTERGEIST -/- This is the first and so far the only attempt in the world to explain Unknown Anomalous Phenomena, including poltergeist, telekinesis and UFO movement, from a scientific perspective that takes into account real, material, physical and mental processes. The basis of NYE's theory is my hypothesis about the effect of a low-frequency electromagnetic field (NEM) modulated by the biorhythms of the human brain phenomenon on the material space formed by the weakest and so far (...) least studied fundamental interaction – the gravitational field (GP). I claim that space has a subtle gravitational structure, which can be influenced even by a weak NAMP with a certain type of modulation. This impact is the cause of all NAYA. Having studied the details of such an impact of a human phenomenon on space, it is possible to create appropriate technical means, including air and space transport without the use of mechanical and jet engines. I came to this understanding as a result of many years of observing the rarest person close to me-a phenomenon that involuntarily, against its will, spontaneously generates the phenomenon of a quiet poltergeist, i.e. changes, displacement, transformation and disappearance of real, everyday objects from a space closed to outsiders. From the standpoint of traditional scientific ideas, all this looks absurd and impossible in principle. As a materialist philosopher, I tried to give the first scientific explanation of what was happening. The paper provides more detailed explanations of this phenomenon and suggests further scientific steps to investigate it. Such research requires the integrated participation of physicists, neuroscientists, physicians, psychologists, psychiatrists, engineers, and also requires the use of appropriate sophisticated electronic equipment. It is time for science to turn to a serious study of such phenomena, and not turn a blind eye to their existence. This will give a powerful impetus to the development of many physical and biological fields of science, as well as philosophy, summarizing the results of scientific knowledge of the world by mankind. (shrink)

My primary goal in this paper is to focus attention on a certain conception of internal access, on the Cartesian conception that a rational subject's capacity to determine sameness and difference in explicit propositional attitudes is independent of knowledge of the external world. This conception of introspection plays a crucial, if unacknowledged, role in numerous arguments and theoretical positions. In particular, it plays a large role in motivating psychological internalism. I argue in favor of rejecting this epistemology and the internalism (...) it supports. (shrink)

In 1932, Rudolf Carnap published his article “Psychology in a Physical Language.” The article prompted a critical response by the Gestalt psychologist Karl Duncker. The exchange is marked by mutual lack of comprehension. In this paper I will provide a contextualized explication of the exchange. I will show that Carnap’s physicalism was deeply rooted in the psychophysical tradition that also informed Gestalt psychological research. By failing to acknowledge this, Carnap missed out on the possibility to enter into a serious debate (...) and to forge an alliance with a like-minded psychologist at the time. I conclude by suggesting that the kind of physicalism practiced by Gestalt psychologists deserves to be taken seriously by current philosophy of psychology. (shrink)

Psychophysical scales can be constructed under suitable restrictions from appropriate data, but they still do not justify privileged internal sensations.

Nonreductive physicalists have a causal exclusion problem. Given certain theses all physicalists accept, including psychophysical supervenience and the causal closure of the physical realm, it is difficult to see how irreducible mental phenomena could make a causal difference to the world. The upshot, according to those who push the problem, is that we must embrace reductive physicalism. Only then is mental causation saved. -/- Grant the argument, at least provisionally. Here our focus is the conditional question: What form should one's (...) reductionism take if it is motivated in part by the exclusion problem? Must one be a type identity theorist, or are alternative reductive views available, as Jaegwon Kim has suggested more than once? (shrink)

This chapter identifies, as a key innovative feature of Hellenistic thought about personality, the idea of the person as a psychophysical unit or whole in Stoicism and Epicureanism. It contrasts this idea with the core-centred or part-based view of the personality sometimes found in Plato and Aristotle, while highlighting certain strands in Platonic or Aristotelian thought that may have helped to shape Stoic and Epicurean thought about personality. Psychophysical holism in Stoicism and Epicureanism is illustrated by reference to their views (...) about the physical nature of the psyche and the development of human beings as embodied psychological wholes. Connections are also traced with some puzzles about identity in Stoic and Epicurean thought. (shrink)

A key ingredient of the metaphysical doctrine of dual-aspect monism is a psychophysically neutral domain, of which mental and physical aspects arise as epistemic descendants that manifest themselves by decomposition. This primer first introduces some elementary notions to define the basic concepts needed to understand the approach, such as those of states, state spaces, observables, partitions and correlations. Using these notions, the concepts of decomposition and manifestation are explained, and a differentiated view of the mereological distinction of wholes and parts (...) is outlined. Next, a number of historical and contemporary accounts of psychophysical neutrality with philosophical (Plato, Spinoza, Schelling, Kant), scientific (Bohm, Pauli, Jung, Connes, Gibson), and artistic (sculpture, music) flavor are given as illustrative examples. Finally, correlations between the psychophysically neutral, the mental, and the physical domain of reality are discussed, in which these correlations are substantiated by meaning. (shrink)

This book describes Descartes's The Passions of the Soul as a foundational work of the Enlightenment, a precursor of later notions of the historicity of the human, and the first psychology of modern type: to understand and heal ourselves, we look not outward at the world in immediate relation to it, but inward, at the self, its brain, and its past history. Special attention is given to Descartes’s account of imagination and its problematic impact on passion and volition.

Kammerer and Frankish (this issue) propose an exciting new research programme on the computational form of introspective systems. Pursuing this goal requires measures that can isolate introspective capacity from response biases and first-order processes. I suggest that metacognitive psychophysics is well placed to meet this challenge, allowing the mapping of introspective architectures in humans, animals, and artificial systems.

What differentiates expressions of pain from other facial expressions? Which facial features convey the most information in an expression of pain? To answer such questions we can explore the expertise of human observers using psychophysical experiments. Techniques such as change detection and visual search can advance our understanding of facial expressions of pain and of evolved mechanisms for detecting these expressions.

We explore experimental methods used to study the phenomena of perceptual organization, first studied by the Gestalt psychologists. We describe an application of traditional psychophysics to perceptual organization and offer alternative methods. Among these, we distinguish two approaches that use multistable stimuli: (1) phenomenological psychophysics, in which the observer's response is assumed to accurately and directly reflect perceptual experience; and (2) the interference paradigm, in which an observer's response is evaluated as correct or incorrect because it pertains to (...) a corrigible task, but does not directly reflect the observer's experience. We show that phenomenological psychophysics can yield valuable information about perceptual organization and lends itself to the development of quantitative theory. We discuss some criticisms of the method and argue that the two approaches that use multistable stimuli are complementary. We also compare each of the approaches with traditional psychophysics. We conclude that the several methods are convergent. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Psychophysical Causation and a Pragmatist Approach to Human BehaviorDavid H. Brendel (bio)Keywordsmind-body problem, philosophy, pragmatism, psychology, psychophysical causationJochen Fahrenberg and Marcus Cheetham have performed a valuable service by conducting and presenting an empirical study of some basic philosophical assumptions of psychologists, philosophers, and scientists. Well-designed, large-scale empirical studies of this kind are all too rare in the literature. Those of us interested in the human sciences are rather in (...) the dark about the assumptions of others working in our own and related fields. For the most part, we are privy only to the philosophical assumptions of friends and colleagues we know intimately and of those relative few who publish their views. We can only speculate about the views of the countless others with whom we have not had the opportunity to establish direct philosophical discourse. The findings presented by Fahrenberg and Cheetham give us an intriguing glimpse at some of the key philosophical assumptions of a variety of clinicians and academics who are interested in human nature and the human sciences.My aim in this commentary is to present an interpretation of a central finding of this questionnaire study: that psychologists were more likely than philosophers and scientists to embrace “psychophysical causation” as a part of their philosophical worldview. It is not, I think, too much of an oversimplification to define psychophysical causation as the presumption that mental events and physical events can cause other mental events and physical events. Psychophysical causation can be distinguished from other positions on the mind–body relation, some of which Fahrenberg and Cheetham mention in their article. Among these alternative positions is epiphenomenalism, the position that physical events cause other physical events and can cause mental events, but that mental events themselves have no causal power. Another philosophical position distinct from psychophysical causation is monism, which holds that all events in the world in general (and in human beings in particular) are physical and are best described in physical terms. Fahrenberg and Cheetham do not describe the multiple forms of monism in detail, but it is worth noting that reductive materialism (Wilson 1998) and eliminative materialism (Churchland 1981) are two highly developed forms of the kind of monism to which they allude. It is beyond the scope of this commentary to explore the differences between the two, but suffice it to say that both these forms of materialism reject the legitimacy of mental [End Page 205] events or the mental vocabulary that refers to such events.It is also beyond the scope of this commentary to advance arguments either for or against psychophysical causation in the philosophy of mind. The concept of psychophysical causation certainly has multiple proponents among philosophers, including those who are ontological monists. The compelling nonreductive materialism of a philosopher such as Terence Horgan, for example, suggests the viability of combining ontological monism with methodological pluralism. In a book chapter entitled “Nonreductive Materialism and the Explanatory Autonomy of Psychology,” Horgan (1993) developed the position that the world is entirely physical (i.e., there are no disembodied minds, persons, or other entities) but is so complex that it can only be understood and explained by employing many vocabularies and methodologies, spanning “the microphysical, neurobiological, macrobiological, and psychological.” This kind of methodological pluralism in the philosophy of mind can be disputed on conceptual grounds, but it seems to be at least as justifiable (and perhaps more justifiable) when compared with other well-defined positions on the mind–body relation.The appeal of nonreductive materialism and psychophysical causation comes into particularly clear focus in contexts where our philosophical concerns are pragmatic in nature. In other words, when we need to achieve practical goals in our everyday lives, we usually benefit from a philosophy that provides us with the flexibility to use a broad range of ideas, conceptual tools, and causal hypotheses that can be adapted to specific needs and challenges. Nonreductive materialism regards the world as a purely physical place, but ensures this kind of conceptual and methodological flexibility when it comes to explaining and predicting complex human experience and behavior. “Typically, certain context-relative features of discourse,” Horgan wrote (1993, 298), “will determine, in a given... (shrink)

This volume presents a series of studies that expand laws, invariants, and principles of psychophysics beyond its classical domain of sensation.

There are many entry points into the problem of categorization. Two particularly important ones are the so-called top-down and bottom-up approaches. Top-down approaches such as artificial intelligence begin with the symbolic names and descriptions for some categories already given; computer programs are written to manipulate the symbols. Cognitive modeling involves the further assumption that such symbol-interactions resemble the way our brains do categorization. An explicit expectation of the top-down approach is that it will eventually join with the bottom-up approach, which (...) tries to model how the hardware of the brain works: sensory systems, motor systems and neural activity in general. The assumption is that the symbolic cognitive functions will be implemented in brain function and linked to the sense organs and the organs of movement in roughly the way a program is implemented in a computer, with its links to peripheral devices such as transducers and effectors. (shrink)

Psychologically faithful deep neural networks (DNNs) could be constructed by training with psychophysics data. Moreover, conventional DNNs are mostly monocular vision based, whereas the human brain relies mainly on binocular vision. DNNs developed as smaller vision agent networks associated with fundamental and less intelligent visual activities, can be combined to simulate more intelligent visual activities done by the biological brain.

I put forward and defend the thesis (Th) that psychophysical supervenience (PS) in its full generality can be satisfactorily supported if and only if one is willing to make one or another of some substantial assumptions (the Assumptions) about the nature of mental and physical properties. I first deal with the “if” part of the claim by presenting and considering the Assumptions. I then argue for the inadequacy of suggestions of support for PS that do not require any of the (...) Assumptions. Finally, I show that as a result of (Th) a PS claim is made potentially stronger than what it would be if (Th) were false. (shrink)