Action-dependent perceptual invariants: from ecological to sensorimotor approaches

Ecological and sensorimotor theories of perception build on the notion of action-dependent invariants as the basic structures underlying perceptual capacities. In this paper we contrast the assumptions these theories make on the nature of perceptual information modulated by action. By focusing on the question, how movement specifies perceptual information, we show that ecological and sensorimotor theories endorse substantially different views about the role of action in perception. In particular we argue that ecological invariants are characterized with reference to transformations produced in the sensory array by movement: such invariants are transformation-specific but do not imply motor-specificity. In contrast, sensorimotor theories assume that perceptual invariants are intrinsically tied to specific movements. We show that this difference leads to different empirical predictions and we submit that the distinction between motor equivalence and motor-specificity needs further clarification in order to provide a more constrained account of action/perception relations.     

A statistical approach to sensorimotor strategies: conjugate cross-correlations

A simple method, based on cross-correlation functions (CCFs) between two time series of kinematic or physiological measurements, is proposed for the analysis of multisegmental movements. Special emphasis is placed on measuring accelerations. When the movements of two body segments are coordinated but consistently time lagged, their CCF displays a peak at the corresponding time abscissa. The reproducible positions of the peaks reflect biomechanical or physiological constraints. Several significantly large peaks can be observed in a CCF. It is possible to identify coordinated movements involving more than two segments by applying simple rules of compatibility between the time lags and between the signs of the correlation peaks. With the method proposed, it is possible to determine the signs of relative variation and the time lags of the successive statistically correlated segmental movements. This is particularly useful in the case of both continuous and periodic sensorimotor control, where classical poststimulus methods cannot be applied. Unlike the classical poststimulus methods, this method does not require a time origin, and it is not necessary to monitor the muscles or even to specify exactly which ones are involved. The method is also applicable to experiments involving a time origin (e.g., and applied perturbation), although in this case it is less accurate than the averaging technique. Individual postural strategies can be identified, which suggests some interesting potential applications of the method to clinical studies.     

Considering situational and dispositional approaches to rational self-interest: an extension and response to de Dreu (2006)

The authors respond to C. K. W. De Dreu's (2006) critique of their article (B. M. Meglino & M. A. Korsgaard, 2004) published in the special section on Theoretical Models and Conceptual Analyses of the Journal of Applied Psychology. They maintain that De Dreu misinterprets their definitions and the psychological processes they addressed and thus raises a number of issues that are not relevant to their model. Meglino and Korsgaard's model focuses on the distinction between rational self-interest and other orientation, whereas the approach taken by De Dreu focuses on the distinction between rational self-interest and collective rationality. In this response, the authors clarify this distinction, address discrepancies between these two approaches, consider the effect of goals and rationality on other orientated behavior, and suggest directions for future research.     

Cognitive development in kittens (Felis catus): an observational study of object permanence and sensorimotor intelligence.

Spontaneous behavior of kittens (Felis catus) was filmed from birth until the end of Month 5 and coded according to Piagetian criteria of sensorimotor intelligence (SI) and object permanence (OP). Data revealed that Stages 2, 3, and 4 of SI were reached at Days 10, 26, and 45, respectively, whereas Stages 2, 3, and 4 of OP were reached at Days 31, 37, and 41, respectively. Spontaneous search behavior was exhibited both in searching for an object that disappeared and in hiding while moving toward a target object. From Day 45 on, search behavior was integrated into a playful social interaction in the form of hide-and-seek. Hence, kittens' spontaneous activity provided them with contexts in which OP was necessary for activity. Lastly, it is proposed that the mobility of both social and physical objects triggered circular activity in this species.     

On the role of social interaction in social cognition: a mechanistic alternative to enactivism

Researchers in the enactivist tradition have recently argued that social interaction can constitute social cognition, rather than simply serve as the context for social cognition. They contend that a focus on social interaction corrects the overemphasis on mechanisms inside the individual in the explanation of social cognition. I critically assess enactivism??s claims about the explanatory role of social interaction in social cognition. After sketching the enactivist approach to cognition in general and social cognition in particular, I identify problems with an enactivist taxonomy of roles for social interaction in the explanation of social cognition (contextual, enabling, and constitutive). In particular, I show that this enactivist taxonomy does not clearly distinguish between enabling conditions and constitutive elements, which would make them in danger of committing the coupling-constitution fallacy found in some attempts to extend cognition. I explore resources enactivism has to more clearly demarcate constitutive parts of a cognitive system, but identify problems in applying them to some of the main cases of social cognition enactivists characterize as being constituted by social interaction. I offer the mechanistic approach to explanation as an alternative that captures much of what enactivists want to say about the relations between social and individual levels, but views social interactions from the perspective of embedded cognition rather than as being constitutive of social cognition.     

Face to face with an enactive approach: A sensorimotor account of face detection and recognition

The enactive approach to perception describes experience as a temporally extended activity of skillful engagement with the environment. This paper pursues this view and focuses on prosopagnosia both for the light that the theory can throw on the phenomenon, and for the critical light the phenomenon can throw on the theory. I argue that the enactive theory is insufficient to characterize the unique nature of experience specific to prosopagnosic subjects. There is a distinct difference in the overall process of detection (with respect to eye movement sequence) of familiar and unfamiliar faces in prosopagnosia; in contrast, normal subjects use the same scanning strategy when exploring both kinds of faces despite an obvious difference in qualitative character. In light of this limitation I outline a supplemental view basing sensorimotor contingencies upon the establishment and reaffirmation of regularities within the organism as it engages with the environment.     

How heaven and humanity are united as one: Tong as an alternative to tianren heyi

The relation between heaven and humanity is a central topic in Chinese philosophy. It is often examined through tianren heyi, a term considered the most significant to Chinese culture. In this article, I argue that tianren heyi is inappropriate and even misleading in our discussion of the relation between heaven and humanity. I investigate its absence from pre-Qin texts, the ambiguity of its meaning, and the exaggeration of its significance in Chinese philosophy. Hence, I advance tong as an alternative. My argument consists of two parts. First, I demonstrate that, in contrast to tianren heyi, tong is widely used as an important term by various early philosophical streams. Second, I focus on Mohist shangtong, Confucian datong, and Taoist xuantong, presenting how different philosophical streams take tong as a central term to develop distinct theories of the ideal relation between heaven and humanity. Instead of tianren heyi, tong can provide a solid step to a full understanding of how heaven and humanity are united.     

The devil in heaven: A near-death experience with both positive and negative facets

Although the considerable majority of reported near-death experiences (NDEs) are associated with positive affect, there are occasional cases of so-called negative NDEs that are dominated by fear and anguish. The phenomenological status of the negative experiences and their relationship to the more typical positive NDEs have been the subject of increasing speculation. In that light, the NDE described in this paper is of interest because it began to unfold as a positive experience but then changed course to become a negatively toned one. We present the details of this case and note its principal theoretical implications.     

What it is like to see: A sensorimotor theory of perceptual experience

The paper proposes a way of bridging the gapbetween physical processes in the brain and the 'felt'aspect of sensory experience. The approach is based onthe idea that experience is not generated by brainprocesses themselves, but rather is constituted by theway these brain processes enable a particular form of'give-and-take' between the perceiver and theenvironment. From this starting-point we are able tocharacterize the phenomenological differences betweenthe different sensory modalities in a more principledway than has been done in the past. We are also ableto approach the issues of visual awareness andconsciousness in a satisfactory way. Finally weconsider a number of testable empirical consequences,one of which is the striking prediction of thephenomenon of 'change blindness'.     

Correction to: HYPE: A System of Hyperintensional Logic (with an Application to Semantic Paradoxes)

Journal of Philosophical Logic - The original version of the article unfortunately contained a mistake. The author missed to mention the support by a EU-funded research network that he is involved...     

HYPE: A System of Hyperintensional Logic (with an Application to Semantic Paradoxes)

Journal of Philosophical Logic - This article introduces, studies, and applies a new system of logic which is called ‘HYPE’. In HYPE, formulas are evaluated at states that may exhibit...     

Predictive joint-action model: A hierarchical predictive approach to human cooperation

Research in a number of related fields has recently begun to focus on the perceptual, cognitive, and motor workings of cooperative behavior. There appears to be enough coherence in these efforts to refer to the study of the mechanisms underlying human cooperative behavior as the field of joint-action (Knoblich, Butterfill, & Sebanz, 2011; Sebanz, Bekkering, & Knoblich, 2006). Yet, the development of theory in this field has not kept pace with the proliferation of research findings. We propose a hierarchical predictive framework for the study of joint-action that we call the predictive joint-action model (PJAM). The presentation of this theoretical framework is organized into three sections. In the first section, we summarize hierarchical predictive principles and discuss their application to joint-action. In the second section, we juxtapose PJAM’s assumptions with empirical evidence from the current literature on joint-action. In the third section, we discuss the overall success of the hierarchical predictive approach to account for the burgeoning empirical literature on joint-action research. Finally, we consider the model’s capacity to generate novel and testable hypotheses about joint-action. This is done with the larger goal of uncovering the empirical and theoretical pieces that are still missing in a comprehensive understanding of joint action.     

Understanding responses to predictive genetic testing: A grounded theory approach

Abstract

In view of the absence of data concerning the understanding and experience of families in which one or more members have undergone predictive genetic testing, a pilot study using a qualitative methodology was conducted with members of families at risk for the late-onset genetic disease, familial adenomatous polyposis (FAP). Semistructured interviews were conducted to elicit illness representations, with responses tape-recorded and analysed using a grounded theory approach. Several themes emerged. The most striking was that when genetic testing indicated an extremely low risk of developing the disease, there was a desire to continue regular bowel screening, even though it was experienced as extremely aversive. Possible explanations draw upon both other themes of the interviews, and psychological models. The role of “functional pessimism” and “uncertain wellness” in maintaining a high threat from the disease, and the role of reinforcement and the nature of tests in providing bowel screening with a high value are discussed.     

Orangutans (Pongo abelii) and a gorilla (Gorilla gorilla gorilla) match features in familiar and unfamiliar individuals

Great apes can perceive images as representative of corresponding real-life objects. Coupled with the potential advantages of identifying specific members of one’s species and mounting evidence for individual recognition in other non-humans, it seems likely that great apes would have the ability to identify conspecifics in photographs. The ability of four orangutans and a gorilla to match images of individuals of their own and a closely related but unfamiliar species was examined here for the first time. First, the subjects matched photographs of familiar conspecifics taken at various time points in a delayed matching-to-sample procedure (Experiment 1). Second, they matched different photographs of unfamiliar individuals of a different species (Experiment 2) at above chance levels. These results suggest that the subjects matched photographs by matching physical features, not necessarily by recognizing the identity of the individuals depicted. However, they also quickly learned to select photographs of familiar individuals when these photographs were paired with photographs of unfamiliar individuals of their own species (Experiment 3), and three subjects showed transfer to novel images of familiar and unfamiliar individuals. Thus, the findings support the idea that subjects attended to physical features to identify individuals that they could categorize on the basis of familiarity.