Vector analysis in visual perception of rolling motion

Summary The well-known visual effect of seeing an isolated, point on the rim of a rolling wheel as moving in a cycloidal track was used for a study of visual vector analysis under non-redundant conditions.Under actual experimental conditions a mean difference of about 20% was found between the mathematically predicted and the perceptual vector analysis. A considerable interperson variation in deviation from the analysis was found. Some Ss showed a deviation of only a few per cent from the mathematically correct response.This investigation was made possible by grants from the Swedish Council for Social Science Research.     

Perceived direction of rotary motion

The starring point for this study was the rotating trapezoidal window. The aim was to reanalyze the problem of information about direction of rotation that is available in simplified proximal stimulations and to study empirically if the Ss utilized the possibilities demonstrated in the theoretical analyses. These analyses showed that a distal poin t moving in a horizontal circular path gives different proximal stimulations when moving clockwise and counterclockwise Further, a distal vertical line moving with its midpoint in the same path has a proximal change of length with different phase relations with the horizontal back-and-forth motion for the two directions. The proximal stimulation is ambiguous, however, unless some restrictions or “decoding principles” are introduced. In the first two experiments it was shown that the Ss could not report “correct” direction of motion of the point but were able to do so about the vertical line. In a third experiment a second vertical line was introduced. This necessitates a determination of relative distance to the two lines. It was shown that the proximally shorter line was usually perceived further away than the proximally longer one. The results are discussed with reference to the trapezoidal window. and some hypotheses are stated.     

A direct approach to individual differences scaling using increasingly complex transformations

A family of models for the representation and assessment of individual differences for multivariate data is embodied in a hierarchically organized and sequentially applied procedure called PINDIS. The two principal models used for directly fitting individual configurations to some common or hypothesized space are the dimensional salience and perspective models. By systematically increasing the complexity of transformations one can better determine the validities of the various models and assess the patterns and commonalities of individual differences. PINDIS sheds some new light on the interpretability and general applicability of the dimension weighting approach implemented by the commonly used INDSCAL procedure.     

A procedure for analyzing metric asymmetric proximity matrices (author's transl)

A method is discussed and illustrated which yields a geometric representation of asymmetric proximity matrices. Assuming the observations are metric the data matrix is uniquely decomposed into a symmetric and a skew-symmetric matrix-valued component. The former entails a spatial configuration vis some MDS technique; the formation contained in the latter can then be integrated into this space in various ways.     

A VERSATILE EYE-MOVEMENT RECORDER

A small, light eye-movement recorder, capable of registering eye movements from the smallest voluntary movements to movements of 20 degrees of arc, is described. A miniature light projector gives a beam of infrared (or blue) light, which is reflected by the cornea of the eye. The beam is deflected by any movement of the eye. An optical system transforms the motion of the beam into changes of light intensity. These are translated into magnified fluctuations of current in a multiplier phototube. The output is translated into graphic form by an ink-writer fitted with a D.C. amplifier. The apparatus, except for the writer but including a helmet, weighs about 300–500 g and is mounted on the subject's head without appreciably disturbing the field of vision.     

Intentionality and Action in Sport: A Discussion of the Views of Searle and Dreyfus

The article looks at sport as a form of human action where the participants display various forms of Intentionality. Intentionality may be defined as ‘that property of many mental states and events by which they are directed at or about or of objects and states of affairs in the world.’ Sporting actions are about human intentions, beliefs, desires, perceptions and not to forget, movements. This means that sports typically display what we call ‘Intentionality.’ The study of Intentionality and intentional actions has previously received relatively little attention among sport philosophers, but deserves more attention. Even though there is a tension and several differences between continental and analytical approaches to philosophical problems, there is a common understanding of the phenomenon we call ‘Intentionality.’ The debate between John Searle, representing the analytical camp, and Hubert Dreyfus, representing the phenomenological camp, is instructive to see the differences, and also the commonalities between the two approaches. The article starts with a clarification of the concept of Intentionality and sketches some of the history and background of the concept. It then presents the main conceptual framework that Searle uses to distinguish the different types and forms of Intentionality and his views on sporting actions. This is followed by a presentation of the phenomenological approach of Dreyfus and the response by Searle. The article ends by discussing the possibility of a combined and enriched view where a clarification of the logic as well as the phenomenology of sporting actions is needed. It may thus be possible to bridge the gap between the two approaches.     

Matching Patient and Therapist Anaclitic–Introjective Personality Configurations Matters for Psychotherapy Outcomes

Decades of psychotherapy research suggest that patient–therapist match accounts for outcome beyond single patient or therapist variables. This study examines the associations between different patterns of patient–therapist matching (in terms of orientation on relatedness or self-definition) and outcomes at termination of psychoanalytic psychotherapy with young adults. Thirty-three patients and their therapists were classified as predominately anaclitic or introjective at baseline. Patients in the convergent patient–therapist dyads (both anaclitic or both introjective) showed significantly greater symptom reduction and increased developmental levels of representations of mother than patients in the complementary dyads (opposite personality configurations). Moreover, convergent patient–therapist match was connected with larger effect sizes on all outcome measures and lower proportion of non-improved patients. These findings suggest the importance of the therapists’ early adjusting their orientation on relatedness or self-definition to their patients’ predominant personality configuration in order to enhance treatment outcomes.     

Local vs. global pragmatics

In ‘Local pragmatics in a Gricean framework’, Mandy Simons argues that, contrary to the received view, it is possible to accommodate local pragmatic effects utilising just the mechanisms for pragmatic reasoning provided by Grice. Although I agree with this overarching claim, this paper argues that we need to be careful in our understanding of ‘what is said’, and the nature of communicated content in general, when deciding between local and global accounts of pragmatic effects.     

Does the Value Circle Exist Within Persons or Only Across Persons?

This study tests whether the Schwartz (1992) value circle exists within individuals, not only across individuals, thereby providing evidence for the within‐person rationale underlying the value circle. We analyze responses from five samples (a representative sample in Britain, a general population sample in the United States, and university students in Britain and Iran) varying in value measures of the Schwartz value theory (SVS, PVQ40, PVQ21). An unfolding model is used to map each person's value profile into a two‐dimensional space representing both persons and values. In all samples, clear value circles were found, with values ordered around the circle largely according to the theory. The model also represents most individuals well. The value circle exists within individuals, providing strong support for the underlying within‐person rationale for the Schwartz (1992) value theory. The unfolding analysis allows identifying which persons fit the model less well and in which way, identifying how meaningful subgroups differ in their value profiles, and testing whether meaningful subgroups have different value structures. The model opens up many new possibilities for research linking values to other variables.