Psychology Commons^™

Detecting Structure In Glass Patterns: An Interocular Transfer Study, Dawn Vreven, Jarrod Berge

Dawn L Vreven

Glass patterns are visual stimuli used here to study how local orientation signals are spatially integrated into global pattern perception. We measured a form aftereffect from adaptation to both static and dynamic Glass patterns and calculated the amount of interocular transfer to determine the binocularity of the detectors responsible for the perception of global structure. Both static and dynamic adaptation produced significant form aftereffects and showed a very high degree of interocular transfer, suggesting that Glass-pattern perception involves cortical processing beyond primary visual cortex. Surprisingly, dynamic adaptation produced significantly greater interocular transfer than static adaptation. Our results suggest a functional …

The Absence Of Depth Constancy In Contour Stereograms, Dawn Vreven, Leslie Welch

Dawn L Vreven

Stereoscopic surfaces constructed from Kanizsa-type illusory contours or explicit luminance contours were tested for three-dimensional (3-D) shape constancy. The curvature of the contours and the apparent viewing distance between the surface and the observer were manipulated. Observers judged which of two surfaces appeared more curved. Experiment 1 allowed eye movements and revealed a bias in 3-D shape judgment with changes in apparent viewing distance, such that surfaces presented far from the observer appeared less curved than surfaces presented close to the observer. The lack of depth constancy was approximately the same for illusory-contour surfaces and for explicit-contour surfaces. Experiment 2 …

Mindscapes And Landscapes: Hayek And Simon On Cognitive Extension, Leslie Marsh

Leslie Marsh

Hayek’s and Simon’s social externalism runs on a shared presupposition: mind is constrained in its computational capacity to detect, harvest, and assimilate “data” generated by the infinitely fine-grained and perpetually dynamic characteristic of experience in complex social environments. For Hayek, mind and sociality are co-evolved spontaneous orders, allowing little or no prospect of comprehensive explanation, trapped in a hermeneutically sealed, i.e. inescapably context bound, eco-system. For Simon, it is the simplicity of mind that is the bottleneck, overwhelmed by the ambient complexity of the environmental. Since on Simon’s account complexity is unidirectional, Simon is far more ebullient about the prospects …

Looking At China’S Great Leap Forward From A Systems Perspective, Brandy Futrell

Brandy Futrell

China’s Great Leap Forward (GLF) campaign of 1958-1961 led by Mao Tse-Tung resulted in a horrendous famine that cost millions of lives. This paper examines the campaign from a systems perspective across the individual, group/societal, and regulatory levels. Looking at each level illustrates errors that explain how the GLF failed.

Auditory Perception Of Material Is Fragile While Action Is Strikingly Robust, Guillaume Lemaitre, Laurie Heller

L M Heller

While many psychoacoustic studies have found that listeners can recover some causal properties of sound-generating objects (such as the material), comparatively little is known about the causal properties of the sound-generating actions and how they are perceived. This article reports on a study comparing the performance of listeners required to identify either the actions or the materials used to generate sound stimuli. Stimuli were recordings of a set of cylinders of two sizes and four materials (wood, plastic, glass, metal) undergoing four different actions (scraping, rolling, hitting, bouncing). Experiment 1 tested how well each sound conveyed that it was generated …

Stigmergy 3.0: From Ants To Economies, Leslie Marsh, Margery Doyle

Leslie Marsh

No abstract provided.

Environmental Protection, U.S. Influence On Latin American Policies, Cigdem Sirin

Cigdem V. Sirin

No abstract provided.

Fiestas, For 12 Percussionists, Bruno Louchourn

Bruno Louchouarn

Fiestas is conceptually inspired by the "Feasts" as social rituals. The musical process and form mirror aspects of group dynamic in these gatherings. Although a few individual players may at times dominate, the ensemble has to "conduct" itself with several sub-groups emerging and disappearing. The main theme, introduced by hand claps, is an oscillation slowly quickening to a fast trepidation, giving way to a stable polyrhythm. The degree of synchronization between players or groups of players varies and generally increases toward more order as the piece unfolds. I wanted to impart a sense of “orchestra” to the group with relatively …

Autism Spectrum Traits Predict The Neural Response To Eye Gaze In Typical Individuals., Lauri Nummenmaa, Andrew Engell, Elisabeth Von Dem Hagen, Richard Henson, Andy Calder

Andrew Engell