In his inaugural lecture, Peter Mascini takes issue with the goal of scientific purity in the behavioral study of law conceived as the deliberate choice to postulate a limited number of universally applicable behavioral principles. The guiding principle of behavioral sociology is that law behaves in correspondence to social space, while the guiding principle of law and economics is that individuals behave rationally. Behavioral economics has challenged the principle of the rational actor and, consequently, has also (...) challenged the desire for scientific purity in law and economics. Peter Mascini defends a two-fold thesis: first, that the purification of sociology proposed by behavioral sociology is a blind alley that can only be exited by allowing impurity. Second, that the behavioral economics movement has offered law and economics an opportunity to reinvigorate by embracing impurity. The combination of the two parts of his thesis lead him to the claim that we need less purity in the behavioral study of law rather than more. He ends his lecture by stating that the introduction of impurity that has been started by behavioral economics needs to be extended in several respects. He proposes to replace the behavioral study of law by an approach that not only takes empirical research seriously, but also adopts a modest attitude by surrendering the ambition to come up with universally applicable predictions and by taking seriously meaningful behavior. (Series: Erasmus Law Lectures, Vol. 41) [Subject: Behavioral Sociology, Law and Economics, Behavioral Economics, Private Law]. (shrink)

Engaged scholarship is an intellectual movement sweeping across higher education, not only in the social and behavioral sciences but also in fields of natural science and engineering. It is predicated on the idea that major advances in knowledge will transpire when scholars, while pursuing their research interests, also consider addressing the core problems confronting society. For a workable engaged agenda in science and technology studies, one that informs scholarship as well as shapes practice and policy, the traditional (...) terms of engagement must be renegotiated to be more open and mutual than has historically characterized the nature of inquiry in this field. At the same time, it is essential to protect individual privacy and preserve government confidentiality. Yet there is a scientific possibility for and benefit to introducing more collaborative and deliberative research approaches between scholar and subject in ways that will not violate these first-order ethics. To make the case, this article discusses the possibilities and perils of engaged science and technology scholarship by drawing on our own recent experiences to conduct and apply STS research while embedded in the National Science Foundation. Brief accounts of these experiences reveal the opportunities as well as the challenges of engaged scholarship. They also provide lessons for those fellow travelers who might follow the authors to this or other like host organizations with ambitions of increasing fundamental knowledge about and applying research to the policies, programs, and decisions of the scientific enterprise. (shrink)

This article discusses an approach to characterizing movement patterns (paths/trajectories) of individual agents that allows for relating aspects of cognitive conceptualization of movement patterns with formal spatial characterizations. To this end, we adopt a perspective of characterizing movement patterns on the basis of perceptual and conceptual invariants that we term movement choremes (MCs). MCs are formally grounded by behaviorally validating qualitative spatio-temporal calculi. Relating perceptual and cognitive aspects of space and formal theories of spatial information has (...) shown promise to foster understanding of the semantics of movement patterns. Specifically, we discuss our approach in relation to existing qualitative formalisms such as the region connection calculus and the Egenhofer’s intersection formalisms. We show that the MC approach is compatible with these approaches but offers additional opportunities to improve the cognitive adequacy of these formalisms. We summarize this paper using a movement taxonomy that also provides guidance for future research. (shrink)

We hypothesize that effective collaboration is facilitated when individuals and environmental components form a synergy where they work together and regulate one another to produce stable patterns of behavior, or regularity, as well as adaptively reorganize to form new behaviors, or irregularity. We tested this hypothesis in a study with 32 triads who collaboratively solved a challenging visual computer programming task for 20 min following an introductory warm‐up phase. Multidimensional recurrence quantification analysis was used to examine fine‐grained (i.e., every 10 (...) s) collective patterns of regularity across team members' speech rate, body movement, and team interaction with the shared user interface. We found that teams exhibited significant patterns of regularity as compared to shuffled baselines, but there were no systematic trends in regularity across time. We also found that periods of regularity were associated with a reduction in overall behavior. Notably, the production of irregular behavior predicted expert‐coded metrics of collaborative activity, such as teams' ability to construct shared knowledge and effectively negotiate and coordinate execution of solutions, net of overall behavioral production and behavioral self‐similarity. Our findings support the theory that groups can interact to form interpersonal synergies and indicate that information about system‐level dynamics is a viable way to understand and predict effective collaborative processes. (shrink)

In perception science, an alternative to focusing on individual sensory systems is to describe the environment to be perceived. We focus on the emergent dynamics of human-environment interactions as an important category of the environment to be perceived. We argue that information about such dynamics is available in subtle patterns of movement variability that, of necessity, stimulate multiple sensory systems.

This paper describes differences in two perspectives on the idea of virtue as a theoretical foundation for positive organizational ethics (POE). The virtue ethics perspective is grounded in the philosophical tradition, has classical roots, and focuses attention on virtue as a property of character. The positive social science perspective is a recent movement (e.g., positive psychology and positive organizational scholarship) that has implications for POE. The positive social science movement operationalizes virtue through an empirical lens that emphasizes virtuous (...) behaviors. From a virtue ethics perspective, a behaviorally based account of virtue is a weak theory of virtue. Observations are suggested for integrating the two perspectives. First, virtue should always be understood as an excellence and is often an optimal point between extreme dysfunctions on continuum of potential states. Second, an empirical exploration of virtue needs to account for character and context. Finally, the properties of organization-level virtue need to be further specified and explored. Implications and directions for future research are discussed. (shrink)

Plamondon & Alimi propose a universal account of trajectory formation and speed/accuracy trade-off in rapid movements but fail, because: (1) the kinematic model ignores the more fundamental dynamics of movement generation, and (2) it does not capture the essential space-time constraints of movement accuracy. Hence, the modeling lacks a biologically and behaviorally principled foundation and is driven by pragmatic function fitting.

This article analyzes the changing politics of hands-on display at the New York Museum of Science and Industry by following its urban deambulation within Midtown Manhattan, which went hand in hand with sharp shifts in promoters, narrative, and exhibition techniques. The museum was inaugurated in 1927 as the Museum of the Peaceful Arts on the 7th and 8th floors of the Scientific American Building. It changed its name in 1930 to the New York Museum of Science and Industry while on (...) the 4th floor of the Daily News Building, and it was close to being renamed the Science Center when it finally moved in 1936 to the ground floor of the Rockefeller Center. The analysis of how the political agenda of the different promoters of the New York Museum of Science and Industry was spatially and performatively inscribed in each of its sites suggests that the 1930s boom of visitor-operated exhibits had nothing to do with an Exploratorium-like rhetoric of democratic empowerment. The social paternalistic ideology of the vocational education movement, the ideas on innovation of the early sociology of invention, and the corporate behavioral approach to mass communications are more suitable contexts in which to understand the changing politics of hands-on display in interwar American museums of science and industry. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Movements of the Mind. A Theory of Attention, Intention and Action by Wayne WuDiego D’AngeloWU, Wayne. Movements of the Mind. A Theory of Attention, Intention and Action. Oxford: Oxford University Press, 2023. 257 pp. Cloth, $80.00Wayne Wu presented a theory of attention as selection-for-action in 2014. According to this theory, given a behavioral space in which the agent has multiple inputs and outputs to choose from, attention (...) involves the selection of a particular course of action, that is, of certain outputs based on certain inputs. In the present work Wu puts to use the selection-for-action theory to shed light on the broader topic of the “movements of the mind”: intentionality and action. Action and movement are mostly not intended as bodily movement: By focusing on mental actions Wu aims to simplify philosophical explanations. His overall theoretical approach remains consistent with his work on attention, which involves a quest to develop rigorous philosophical concepts while incorporating insights from the empirical sciences. Interestingly, biology takes precedence over cognitive sciences and psychology for him; he says, “I aspire to a biology of agency” in which philosophical analysis must respond to “empirical friction.” In this framework, this book puts forth four main claims. The first concerns the general structure of action—action arises from solving a selection problem. Second, intentional actions can be differentiated from unintentional actions using the concepts of automaticity and control. Third, Wu argues that attention is a necessary aspect of every theory of action. Fourth, he claims that intention is practical memory for action. These four are woven throughout the different chapters of his book.The first part analyzes the structure of action along three axes: how the agent “takes things to be” as the basis for selection, the agent’s response to those things, and the biases that explain the link between perceptions and responses. In the second part, Wu presents a theory of intention as practical memory. The theory is surprising, as Wu himself acknowledges when he says, “The approach to intention will, I think, jar many readers.” And indeed, it does, but Wu provides strong arguments, and future work will determine if the theory is feasible. The third part of the book explores the implications of his theory of action for specific forms and aspects of action; the first chapter in this section deals with automaticity and biases, [End Page 734] the second deals with deductive reasoning, and the third deals with introspection.According to Wu’s theory, action involves a complex combination of elements. The agent is faced with many inputs and potential outputs within a behavioral space. She takes inputs in a certain way: The way she sees things is influenced by myriad aspects, such as intentions and biases of various forms. Action and intending to act are solutions to the problem of selecting appropriate inputs and outputs. Wu thematizes the role of attention in this process of selection. Attention comes in three different forms. It can be an action itself (“attending,” for example, in searching for something); it can mean “vigilance” as readiness to act; and most importantly, attention is “mental guidance.” Every action is guided by attention insofar as a selection problem must be solved: Attention is guiding when perceptual input “plays a functional role of guiding.” Attention also shapes the agent’s actions through remembering, and remembering in turn is nothing else then attending to remembered content. This attended content provides the agent with biases and reasons to select a particular course of action. Therefore, intending to act is nothing else than practical memory, that is, memory put to work in the choice of actions.One particular type of action that is crucially important for philosophical research is introspection. According to Wu, introspection, like every kind of mental action, is not entirely reliable—as some theories would have it—or entirely unreliable but, instead, depends on context. Like any other action, introspection follows the same guiding principle, attention, specifically, perceptual attention. Therefore, introspection is a particular type of perceptual experience where attention is focused on one’s own mental states. In this way, Wu establishes criteria for veridical introspective reports, such... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Pragmatism and a Behavioral Theory of Meaning HAROLD N. LEE IT HAS BEEN ALMOST ONE HUNDRED YEARS since the publication of Peirce's article "How to Make Our Ideas Clear" in the Popular Science Monthly. There Peirce stated what came to be called The Pragmatic Maxim. 1 Since then pragmatism has been developed and expounded by many proponents. Some of the developments have differed markedly from others, and some (...) of these differences are not easily compatible.2 Opponents of pragmatism have differed in their interpretations in step with the proponents. As the century is rounded out, we should be able to review the scene and appraise the maneuvers and sorties. Just what is pragmatism? It has often been held that pragmatism is not the name of a philosophy but only of a loose collection of philosophies having at most a faint family resemblance. It must be admitted that this interpretation received some support from James's genial and hospitable personality. Nevertheless, I think it is incorrect. We can now discern a central, characterizing position which the early proponents of the new movement were setting forth and defending; and we can free it from misunderstandings that have historically beset it. It was apparent from the first that action and the consequences of action were to be regarded as fundamental to the new position, but this characterization is vague enough to cover many incompatible special developments. It can be sharpened now, after a century of discussion and debate, and we can identify the respects in which action is central, thus separating the general position from the special interests belonging to one or another of the individuals who were its early advocates. Such clarification will reveal a pragmatism that is highly relevant to contemporary philosophy. I. Peirce proposed his maxim as a theory of meaning: the clear apprehension of an idea is to be obtained by considering the effects or consequences on future possible action that follow from the idea. Meanings consist in the possible effects of present experience on future behavior. In accordance with the pragmatic maxim, I shall take the behavioral theory of meaning and the behavioral theory of knowledge that issues from it to be the central position of pragmatism. What is either incompatible or unnecessary to this behavioral core is expendable, and if it has contributed to the misunderstanding or misrepresentation of the core, it should be abandoned in the further development of pragmatism. Both Peirce and James presented pragmatism primarily 1 Collected Papers o/ Charles Sanders Peirce, vols. 1-6 ed. by Charles Hartshorne and Paul Weiss; vols. 7-8 ed. by Arthur W. Burks (Cambridge, Mass.: Harvard University Press, 1931-35, 1958), vol. 5, paragraphs 2 and 402. Hereafter cited as CP followed by volume and paragraph number. 2 See A. O. Lovejoy, "The Thirteen Pragmatisms," Journal o[ Philosophy, V (1908); reprinted in The Thirteen Pragmatisms and Other Essays (Baltimore: The Johns HopkinsPress, 1963). [435] 436 HISTORY OF PHILOSOPHY as a method, but in the philosophies of both, and of Dewey as well, the emphasis on method is often obscured by specific doctrines in some field such as ontology, epistemology or ethics; and in the cases especially of James and Dewey, it was the special doetrines that elicited the bulk of the adverse criticism. The pragmatism of all the early pragmatists was so mixed with other advocacies and causes that it was often difficult to distinguish between what should be called pragmatic and what should not. Pragmatism did not emerge full-blown in stark separateness. Certain auxiliary positions that revolve around the behavioral theory of meaning also characterize pragmatism. They are to be found in the writings of all the early pragmatists and both yield and receive systematic support from the behavioral theory of meaning. Together with the theory of meaning they demarcate the core of pragmatism. The list is as follows: (1) Meaning and knowledge are behaviorally defined. (2) The various forms of pragmatism share an evolutionary, naturalistic outlook. (3) They all emphasize, in harmony with the evolutionary outlook, process and time-especially the continuity of passage and temporality. (4) They all show, in harmony with the continuity of process, a tendency to reject Cartesian dualism... (shrink)

A controversial claim in recent dual process accounts of reasoning is that intuitive processes not only lead to bias but are also sensitive to the logical status of an argument. The intuitive logic hypothesis draws upon evidence that reasoners take longer and are less confident on belief–logic conflict problems, irrespective of whether they give the correct logical response. In this paper, we examine conflict detection under conditions in which participants are asked to either judge the logical validity or believability of (...) a presented conclusion, accompanied by measures of eye movement and pupil dilation. The findings show an effect of conflict, under both types of instruction, on accuracy, latency, gaze shifts, and pupil dilation. Importantly, these effects extend to conflict trials in which participants give a belief‐based response (incorrectly under logic instructions or correctly under belief instructions) demonstrating both behavioral and physiological evidence in support of the logical intuition hypothesis. (shrink)

The topic of developing professionalism dominated the content of many academic medicine publications and conference agendas during the past decade. Calls to address the development of professionalism among medical students and residents have come from professional societies, accrediting agencies, and a host of educators in the biomedical sciences. The language of the professionalism movement is now a given among those in academic medicine. We raise serious concerns about the professionalism discourse and how the specialized language of academic medicine (...) disciplines has defined, organized, contained, and made seemingly immutable a group of attitudes, values, and behaviors subsumed under the label of "professionalism." In particular, we argue that the professionalism discourse needs to pay more attention to the academic environment in which students are educated, that it should articulate specific positive behaviors, that the theory of professionalism must be constructed from a dialogue with those we are educating, and that this theoretical and practical discourse must aim at a deeper understanding of social justice and the role of medicine within a just society. (shrink)

Fitts' law and the [Delta][Lambda] model are theories of motor control because they are limited to the kinematic aspects of movement and do not capture its essential dynamic nature. The internal source of that determines the speed/accuracy trade-off can be associated with the partial compensation of movement-generated forces.

The issues the commentators have raised and which we address, include: the debate over how attention is allocated during reading; our distinction between early and late stages of lexical processing; our assumptions about saccadic programming; the determinants of skipping and refixations; and the role that higher-level linguistic processing may play in influencing eye movements during reading. In addition, we provide a discussion of model development and principles for evaluating and comparing models. Although we acknowledge that E-Z Reader is incomplete, we (...) maintain that it provides a good framework for systematically trying to understand how the cognitive, perceptual, and motor systems influence the eyes during reading. (shrink)

In Consecrating Science: Wonder, Knowledge, and the Natural World, Lisa H. Sideris makes a compelling case that a new cosmology movement advocates for a new, universal, creation story grounded in the sciences. She fears the new story reinforces elite power structures and anthropocentrism and thus environmental degradation. Alternatively, she promotes genuine wonder which occurs in experiences of the natural world. As Sideris focuses on the likely logical outcome of the assumptions and arguments of the new cosmologies, she does (...) not investigate whether and how people react to these new myths. I suggest that methods of documentary studies, applied to popular book reviews on Amazon and Goodreads, shed light on the ramifications of the new cosmologies among the general public. While many reviewers exhibit attitudes and behaviors that would concern Sideris, responses are far from univocal. Using this case as a guide, I suggest that attention to the experience of laypeople could contribute productively to religion and science research in general. (shrink)

Aspects of human symbolic evolution are studied by scholars active in a variety of fields and disciplines in the life and the behavioral sciences as well as the scientific-philosophical, sociological, anthropological, and linguistic sciences. These fields and disciplines all take on an evolutionary approach to the study of human symbolism, but scholars disagree in their theoretical and methodological attitudes. Theoretically, symbolism is defined differentially as knowledge, behavior, cognition, culture, language, or social group living. Methodologically, the diverse symbolic (...) evolution sciences establish their teachings upon diverging evolutionary biological schools and paradigms. This chapter reviews past and current research fields in human symbolic evolution for how they differentially implement tenets of the major evolution schools that were discussed in the previous chapter. Traditional evolutionary epistemology and biosemiotics bring in a mesoevolutionary outlook by drawing on early Darwinism and evolutionary developmental biology movements that emphasize the role of the organism in evolution. Communication studies instead originally take on a microevolutionary perspective by investigating how units of information are transmitted across generations through time. Only later do they integrate studies on meaning-making at the organismal level. Sociobiology complements a microevolutionary with a macroevolutionary outlook by implementing population genetic approaches, typical of the Modern Synthesis, into studies on individual and group behavior. The new symbolic evolutionary sciences build upon these traditions and include disciplines such as evolutionary psychology, evolutionary linguistics, evolutionary anthropology, evolutionary archaeology, evolutionary sociology, and evolutionary economics. Originally centered on implementing Darwinian selection theory, these fields are now including ecological and evolutionary developmental biology as well as reticulate evolutionary paradigms. As diverse in outlook and scope as they are, no discipline holds a privileged position over the other and all have made valuable contributions to our understanding of human symbolic evolution. (shrink)

While explaining a large proportion of any variance, accounts of the speed and accuracy of targetting movements use techniques (e.g., log transforms) that typically reduce variability before ''explaining'' the data. Therefore the predictive power of such accounts are important. We consider whether Plamondon's model can account for kinematics of targetting movements of clinical populations.

The E-Z Reader model (Reichle et al. 1998; 1999) provides a theoretical framework for understanding how word identification, visual processing, attention, and oculomotor control jointly determine when and where the eyes move during reading. In this article, we first review what is known about eye movements during reading. Then we provide an updated version of the model (E-Z Reader 7) and describe how it accounts for basic findings about eye movement control in reading. We then review several alternative models (...) of eye movement control in reading, discussing both their core assumptions and their theoretical scope. On the basis of this discussion, we conclude that E-Z Reader provides the most comprehensive account of eye movement control during reading. Finally, we provide a brief overview of what is known about the neural systems that support the various components of reading, and suggest how the cognitive constructs of our model might map onto this neural architecture. Key Words: attention; eye-movement control; E-Z Reader; fixations; lexical access; models; reading; regressions; saccades. (shrink)

Shadmehr and Ahmed cogently argue that vigor of appetitive movements is positively correlated with their value, and that value can therefore be inferred by measuring vigor. Here, we highlight three points to consider when interpreting this account: (1) The correlation between vigor and value is not obligatory, (2) the vigor effect also arises in frameworks other than optimal foraging, and (3) the term vigor can be misinterpreted, thereby affecting rigor.

To controlforceaccurately under a wide range of behavioral conditions, the central nervous system would either require a detailed, continuously updated representation of the state of each muscle (and the load against which each is acting) or else force feedback with sufficient gain to cope with variations in the properties of the muscles and loads. The evidence for force feedback with adequate gain or for an appropriate central representation is not sufficient to conclude that force is the major controlled variable (...) in normal limb movements.Morton's hypothesis, thatlengthis controlled by a follow-up servo, has a number of difficulties related to the delays, gains, variability, and specificity in feedback pathways comprising potential servo loops. However, experimental evidence is consistent with these pathways providing servo assistance for some movements produced by coactivation of α- and static γ-motoneurons. Dynamic γ-motoneurons may provide an additional input for adaptive control of different types of movements.The idea that feedback is used to compensate for changes in musclestiffnesshas received experimental support under static postural conditions. However, reflexes tend to increase rather than decrease the range of variation in muscle stiffness during some cyclic movements. Theoretical problems associated with the regulation of stiffness are also discussed. The possibilities of separate control systems forvelocityorviscosityare considered, but the evidence is either negative or lacking. I conclude that different physical variables can be controlled depending on the type of limb movement required. The concept of stiffness regulation is also useful under some conditions, but should probably be extended to the regulation of the visco-elastic properties (i.e., the mechanical impedance) of a muscle or joint. (shrink)

Existing research shows that people can improve their decision skills by learning what experts paid attention to when faced with the same problem. However, in domains like financial education, effective instruction requires frequent, personalized feedback given at the point of decision, which makes it time‐consuming for experts to provide and thus, prohibitively costly. We address this by demonstrating an automated feedback mechanism that allows amateur decision‐makers to learn what information to attend to from one another, rather than from an expert. (...) In the first experiment, eye movements of N = 100 subjects were recorded while they repeatedly performed a standard behavioral finance investment task. Consistent with previous studies, we found that a significant proportion of subjects were affected by decision bias. In the second experiment, a different group of N = 100 subjects faced the same task but, after each choice, they received individual, machine learning‐generated feedback on whether their pre‐decision eye movements resembled those made by Experiment 1 subjects prior to good decisions. As a result, Experiment 2 subjects learned to analyze information similarly to their successful peers, which in turn reduced their decision bias. Furthermore, subjects with low Cognitive Reflection Test scores gained more from the proposed form of process feedback than from standard behavioral feedback based on decision outcomes. (shrink)

Although the model proposed by Thelen and co-authors provides a detailed explanation for the processes underlying reaching, many aspects of it are highly speculative. One of the reasons for this is our lack of knowledge about transformation of a hand movement plan into joint movements. The leading joint hypothesis (LJH) allows us to partially fill in this gap. The LJH offers a possible explanation for the formation of movement and how it may be represented in memory. Our explanation (...) converges with the dynamic model described in the target article. (shrink)

About 30 years ago, the Dynamical Hypothesis instigated a variety of insights and transformations in cognitive science. One of them was the simple observation that, quite unlike trial-based tasks in a laboratory, natural ecologically valid behaviors almost never have context-free starting points. Instead, they produce lengthy time series data that can be recorded with dense-sampling measures, such as heartrate, eye movements, EEG, etc. That emphasis on studying the temporal dynamics of extended behaviors may have been the trigger that led to (...) a rethinking of what a “representation” is, and then of what a “cognitive agent” is. This most recent and perhaps most revolutionary transformation is the idea that a cognitive agent need not be a singular physiological organism. Perhaps a group of organisms, such as several people working on a joint task, can temporarily function as one cognitive agent – at least while they're working adaptively and successfully. (shrink)

A theory is presented to explain how accurate, single-joint movements are controlled. The theory applies to movements across different distances, with different inertial loads, toward targets of different widths over a wide range of experimentally manipulated velocities. The theory is based on three propositions. (1) Movements are planned according to “strategies” of which there are at least two: a speed-insensitive (SI) and a speed-sensitive (SS) one. (2) These strategies can be equated with sets of rules for performing diverse movement (...) tasks. The choice between SI and SS depends on whether movement speed and/or movement time (and hence appropriate muscle forces) must be constrained to meet task requirements. (3) The electromyogram can be interpreted as a low-pass filtered version of the controlling signal to the motoneuron pools. This controlling signal can be modelled as a rectangular excitation pulse in which modulation occurs in either pulse amplitude or pulse width. Movements to different distances and with loads are controlled by the SI strategy, which modulates pulse width. Movements in which speed must be explicitly regulated are controlled by the SS strategy, which modulates pulse amplitude. The distinction between the two movement strategies reconciles many apparent conflicts in the motor control literature. (shrink)

Our commentary focuses, first, on Glover's proposal that only motor planning is sensitive to cognitive aspects of the target object, whereas the on-line control is completely immune to them. We present behavioural data showing that movement phases traditionally (and by Glover) thought to be under on-line control, are also modulated by object cognitive aspects. Next, we present data showing that some aspects of cognition can be coded by means of movement planning. We propose a reformulation of Glover's theory (...) to include both an influence of cognition on on-line movement control, and a mutual influence between motor planning and some aspects of cognition. (shrink)

Some individuals have a neurogenetic vulnerability to developing strong facilitation of ingestive movements by learned configurations of biosocial stimuli. Condemning food as addictive is mere polemic, ignoring the contextualised sensory control of the mastication of each mouthful. To beat obesity, the least fattening of widely recognised eating patterns need to be measured and supported.

We address three issues that might be important in evaluating the validity of the planning–control model: (1) It could be artificial to distinguish between control and planning when control involves the re-planning of a new corrective submovement that overlaps with the initial response; (2) experiments involving illusions are not totally compelling; (3) selectively implicating the superior parietal lobe in movement control and the basal ganglia in movement planning, appears questionable.

Measurements of the dimensionality of chaotic attractors obtained on behavioral data represent the task complexity and also could be hypothesized to reflect the number of synchronized neural groups involved in the generation of the data. The changes in dimensionality for different experimental conditions suggest that limited processing capacity, task complexity, demand, and synchrony in neural firing might be closely related.

It is argued here that a critical prediction of the E-Z Reader model is that experimental manipulations that disrupt early encoding of visual and orthographic features of the fixated word without affecting subsequent lexical processing should influence the processing difficulty of the fixated word without producing any processing effect on the next word. This prediction is explained and illustrated.

We identify two aspects of the problem of maintaining perceptual stability despite an observer's eye movements. The first, visual direction constancy, is the (egocentric) stability of apparent positions of objects in the visual world relative to the perceiver. The second, visual position constancy, is the (exocentric) stability of positions of objects relative to each other. We analyze the constancy of visual direction despite saccadic eye movements.Three information sources have been proposed to enable the visual system to achieve stability: the structure (...) of the visual field, proprioceptive inflow, and a copy of neural efference or outflow to the extraocular muscles. None of these sources by itself provides adequate information to achieve visual direction constancy; present evidence indicates that all three are used.Our final question concerns how information processing operations result in a stable world. The three traditionally suggested means have been elimination, translation, or evaluation. All are rejected. From a review of the physiological and psychological evidence we conclude that no subtraction, compensation, or evaluation need take place. The problem for which these solutions were developed turns out to be a false one. We propose a “calibration” solution: correct spatiotopic positions are calculated anew for each fixation. Inflow, outflow, and retinal sources are used in this calculation: saccadic suppression of displacement bridges the errors between these sources and the actual extent of movement. (shrink)

Byrne & Russon use novelty as the primary requirement for providing evidence of true imitation in animals. There are three reasons to object to this. First, experiential learning cannot always be completely excluded as an alternative explanation of the observed behavior. Second, the imitator's manipulations performed during ontogeny cannot be known in full detail. Finally, there is at present only a weak understanding of how novel forms emerge. Data from our own recent experiments will be used to emphasize the need (...) for a tighter methodology in imitation experiments. (shrink)

The Visual World Paradigm (VWP) presents listeners with a challenging problem: They must integrate two disparate signals, the spoken language and the visual context, in support of action (e.g., complex movements of the eyes across a scene). We present Impulse Processing, a dynamical systems approach to incremental eye movements in the visual world that suggests a framework for integrating language, vision, and action generally. Our approach assumes that impulses driven by the language and the visual context impinge minutely on a (...) dynamical landscape of attractors corresponding to the potential eye-movement behaviors of the system. We test three unique predictions of our approach in an empirical study in the VWP, and describe an implementation in an artificial neural network. We discuss the Impulse Processing framework in relation to other models of the VWP. (shrink)

Vaesen suggests that motor control is not among the primary origins of the uniqueness of human tool use. However, recent findings show that cognitive processes involved in control of human limb movements may be much more sophisticated than it was believed previously. The sophistication of movement control may substantially contribute to the uniqueness of humans in tool use.

Recent studies have documented substantial variability among typical listeners in how gradiently they categorize speech sounds, and this variability in categorization gradience may link to how listeners weight different cues in the incoming signal. The present study tested the relationship between categorization gradience and cue weighting across two sets of English contrasts, each varying orthogonally in two acoustic dimensions. Participants performed a four‐alternative forced‐choice identification task in a visual world paradigm while their eye movements were monitored. We found that (a) (...) greater categorization gradience derived from behavioral identification responses corresponds to larger secondary cue weights derived from eye movements; (b) the relationship between categorization gradience and secondary cue weighting is observed across cues and contrasts, suggesting that categorization gradience may be a consistent within‐individual property in speech perception; and (c) listeners who showed greater categorization gradience tend to adopt a buffered processing strategy, especially when cues arrive asynchronously in time. (shrink)