The Emergence of Prägnanz: Gaetano Kanizsa's Legacies

This paper is devoted to stress the importance of the contribution of Gaetano Kanizsato contemporary psychology. His theoretical ideas have in many respects been truly seminal. In particular, are emphasized his distinction between the primary and secondary process, his criticism of the concept ofPrägnanz, and his focus on self-organisation in a dynamic approach. To continue his work, the main task is to identify the rules and constraints that enable us to see the world as it appears. In the last years of his scientific work, his insight was that the non-linear dynamic approach may be the best way to achieve this goal, giving a more sound sense to the intuitions of Gestalt psychologie.Unfortunately, he died before he could reap the fruits of this insight. Here are reviewed the first results that some among his direct and indirect pupils have obtained in this direction.     

Quantitative Versuche über die Prägnanz von Punktmustern

Summary The intention of the paper is to describe Prägnanz-phenomena in terms of information theory. Two different concepts for the application of informational variables to perceptual processes are discriminated. For several reasons, Attneave's concept (1951) is preferred: In the sense of information theory single figures can be treated as signal structures; thus the degree of regularity in them should be specifiable in terms of informational variables.Two quasi-informational parameters are used to describe the degree of regularity in simple dot patterns.It was expected that perceived figural quality of dot patterns would increase with the redundancy of spatially distributed messages. At a constant word-length (= constant number of dots), the quality perceived should be the better the lower the entropy (or uncertainty) of the figure.In several experiments the information measures used turned out to be closely related to different operationally defined response-variables for figural quality, e.g. figural goodness-ratings and exactness of the reproduction of dot-positions. Besides, an inverse relationship is observed between interestingness-ratings and redundancy measures.The results are discussed in terms of information theory and psychological concepts. It is shown, that it has important implications on the psychological theory of perception to regard the human perceiver as an information-decoding-system. Apparently there must be some dynamically active system which enables the perceiver to utilize the redundancy of spatial brightness-distributions for sure and quick recognition.     

What has happened to Prägnanz? Coding,stability, or resonance

Three theoretical measures of Prägnanz were compared with four data sets. The theoretical measures were a stimulus-coding one (structural information load, SIL), a measure related to within memory processes (stability), and one based on the interaction of perception and memory (resonance). The four data sets were obtained in two experiments and involved goodness rating, grouping, and immediate and delayed recall. A complete set of seven-element binary serial patterns was used in each experiment. Both SIL and resonance were shown to correlate reliably with the data sets across tasks. The resonance measure, however, performed best. Prägnanz thus appears to be explained better by resonance than by stimulus coding or memory storage. Resonance explained all systematic variance in the recall tasks, but not in the other tasks. Regarding these, partial-correlation analyses showed that the effect of stability could be fully reduced to resonance. SIL could not be similarly reduced. Therefore, additional perceptual constraints, other than resonance, would be needed for a complete account of goodness in the judging or grouping tasks.     

On the Relation between Kanizsa's Bias Towards Convexity and the Gestaltists Prägnanz from the Perspective of Current in Shape Recognition

What is the relation between Kanizsa's bias towards convexity and the Gestaltists' demonstrations that perceptual organization obeys a principle of pragnänz, or simplicity? Why should either kind of bias exist? Textbook accounts assign no functional role for these biases. Geon theory (Biederman 1987) proposes that we can understand these biases in terms of fundamental processes by which complex objects are decomposed into convex (or singly concave) regions at points of matched cusps according to the transversality regularity (Hoffman and Richards 1985). Such decomposition yields simple, convex parts segmented between the concavities. A shape that contains concavities is generally regarded as complex insofar as it can be decomposed into the regions, or parts, between the concavities. It is these simple parts that are the stable elements of shape, not the whole object. In fact, geon theory leads to the expectation that shape recognition proceeds most efficiently when the parts are good (in the pragnänz sense) but the object is bad!     

Prävention

Ohne Zusammenfassung     

Précis of The brain and emotion

The topics treated in The brain and emotion include the definition, nature, and functions of emotion (Ch. 3); the neural bases of emotion (Ch. 4); reward, punishment, and emotion in brain design (Ch. 10); a theory of consciousness and its application to understanding emotion and pleasure (Ch. 9); and neural networks and emotion-related learning (Appendix). The approach is that emotions can be considered as states elicited by reinforcers (rewards and punishers). This approach helps with understanding the functions of emotion, with classifying different emotions, and in understanding what information-processing systems in the brain are involved in emotion, and how they are involved. The hypothesis is developed that brains are designed around reward- and punishment-evaluation systems, because this is the way that genes can build a complex system that will produce appropriate but flexible behavior to increase fitness (Ch. 10). By specifying goals rather than particular behavioral patterns of responses, genes leave much more open the possible behavioral strategies that might be required to increase fitness. The importance of reward and punishment systems in brain design also provides a basis for understanding the brain mechanisms of motivation, as described in Chapters 2 for appetite and feeding, 5 for brain-stimulation reward, 6 for addiction, 7 for thirst, and 8 for sexual behavior.     

Homosexualität und Prägung

Ohne ZusammenfassungMit Unterstützung der Deutschen Forschungsgemeinschaft.     

Gewaltprävention statt Präventivschlag

Die Psychotherapie -     

What has happened to Pr?gnanz? Coding, stability, or resonance.

Three theoretical measures of Pr?gnanz were compared with four data sets. The theoretical measures were a stimulus-coding one (structural information load, SIL), a measure related to within memory processes (stability), and one based on the interaction of perception and memory (resonance). The four data sets were obtained in two experiments and involved goodness rating, grouping, and immediate and delayed recall. A complete set of seven-element binary serial patterns was used in each experiment. Both SIL and resonance were shown to correlate reliably with the data sets across tasks. The resonance measure, however, performed best. Pr?gnanz thus appears to be explained better by resonance than by stimulus coding or memory storage. Resonance explained all systematic variance in the recall tasks, but not in the other tasks. Regarding these, partial-correlation analyses showed that the effect of stability could be fully reduced to resonance. SIL could not be similarly reduced. Therefore, additional perceptual constraints, other than resonance, would be needed for a complete account of goodness in the judging or grouping tasks.     

Précis of Neural organization: structure, function, and dynamics

NEURAL ORGANIZATION: Structure, function, and dynamics shows how theory and experiment can supplement each other in an integrated, evolving account of the brain's structure, function, and dynamics. (1) STRUCTURE: Studies of brain function and dynamics build on and contribute to an understanding of many brain regions, the neural circuits that constitute them, and their spatial relations. We emphasize Szentágothai's modular architectonics principle, but also stress the importance of the microcomplexes of cerebellar circuitry and the lamellae of hippocampus. (2) FUNCTION: Control of eye movements, reaching and grasping, cognitive maps, and the roles of vision receive a functional decomposition in terms of schemas. Hypotheses as to how each schema is implemented through the interaction of specific brain regions provide the basis for modeling the overall function by neural networks constrained by neural data. Synthetic PET integrates modeling of primate circuitry with data from human brain imaging. (3) DYNAMICS: Dynamic system theory analyzes spatiotemporal neural phenomena, such as oscillatory and chaotic activity in both single neurons and (often synchronized) neural networks, the self-organizing development and plasticity of ordered neural structures, and learning and memory phenomena associated with synaptic modification. Rhythm generation involves multiple levels of analysis, from intrinsic cellular processes to loops involving multiple brain regions. A variety of rhythms are related to memory functions. The Précis presents a multifaceted case study of the hippocampus. We conclude with the claim that language and other cognitive processes can be fruitfully studied within the framework of neural organization that the authors have charted with John Szentágothai.     

Prüfungsangst bewältigen

Test anxiety or exam anxiety is a prevalent problem among students. Therefore, a high proportion of students seek help in university counseling centers. Based on a theoretical review of psychological theories and models of test anxiety, a cognitive-behavioral training program for coping with test anxiety as well as the evaluation of the program is presented. The program includes elements of behavior training with video-supported role playing and simulation of (oral) test situations, enhancement of learning and preparation strategies including time management as well as cognitive intervention strategies and relaxation training. Evaluation of the workshop program shows significant reduction of test anxiety and the strengthening of self-efficacy. The group program also lends itself for application with other groups, such as school students or for the preparation of job interviews.     

Prävention in der Arbeitswelt

In the new working world with its growing turbulences and increasing demands prevention is getting more difficult but at the same time increasingly necessary. New forms of working and of organization, the vanishing limits between work and private life and the promotion of patchwork patterns in both areas call for adequately differentiated prevention concepts. People have to be beside the enhancement of their qualification (performance enhancement) prepared for the future in their effectiveness and health (social competence, employability) as the individual aspect. The situation and the organization (structure) have to be preventively shaped in a way, that the desired interactions in the field of performance, health, security and life quality may be experienced. A blueprint for this purposes is presented here accompanied by practical instruments and propositions for prevention as for example bonification.     

Sensuality and venality in Bangkok: The dynamics of cross‐cultural mapping of prostitution

The dynamics of cross‐cultural cognitive mapping is examined, from a Schuetzian perspective, on the example of the changing images formed by farangs (white foreigners) of Thai girls engaged in “open‐ended” tourist‐oriented prostitution, a vaguely‐defined, gray area lying between “full‐fledged prostitution” and “straight” sexuality. The newcomer farang, unable to grasp this culture‐specific category, initially tends to refuse to label the girls as “prostitutes,” but, with growing experience, tends to apply that label to them, without, however, thereby resetting the boundaries of his cognitive map. He thus fails to make the transition from strangeness to familiarity with the host culture, as conceived by Schuetz—since he continues to impose the crisp categorizations prevalent in his culture of origin, on a situation which is fuzzily conceived in different categories by the hosts. The case study exemplifies the difficulties of a cross‐cultural definition and identification of prostitution.