Form Perception

11.

Functional anatomy and differential time courses of neural processing for explicit, inferred, and illusory contours. An event-related fMRI study.

The perception of shape does not necessarily require viewing an explicit outline figure. Using event-related functional magnetic resonance imaging we examined the time courses of neural activations provoked by shapes defined by (1) lines, (2) illusory ...
Afra Ritzl, John C Marshall, Peter H Weiss, Oliver Zafiris, Nadim J Shah, Karl Zilles, Gereon R Fink (Neuroimage, 200308)
functional-anatomy-differential-time-courses-neural-processing.asp

12.

Body-image perceptions: reliability of a BMI-based Silhouette Matching Test.

OBJECTIVE: To assess the reliability of a BMI-based Silhouette Matching Test (BMI-SMT). METHODS: The perceptions of ideal and current body images of 215 ninth through twelfth graders were assessed at 5 different schools within a mid-Atlantic state public ...
Michael Peterson, Deborah Ellenberg, Sarah Crossan (Am J Health Behav, 200307-08)
body-image-perceptions-reliability-bmi-based-silhouette-matching-test.asp

13.

A high density ERP comparison of mental rotation and mental size transformation.

To compare mental rotation and mental size transformation, 128-channel EEG was recorded while subjects performed both tasks using random two-dimensional shapes as stimuli. Behavioural results showed significant linear effects of both size transformation ...
Suresh D Muthukumaraswamy, Blake W Johnson, Jeff P Hamm (Brain Cogn, 200307)
high-density-erp-comparison-mental-rotation-mental-size-transformation.asp

14.

Cortical effects of shifting letter position in letter strings of varying length.

Neuroimaging and lesion studies suggest that occipito-temporal brain areas play a necessary role in recognizing a wide variety of objects, be they faces, letters, numbers, or household items. However, many questions remain regarding the details of ...
Piers Cornelissen, Antti Tarkiainen, Päivi Helenius, Riitta Salmelin (J Cogn Neurosci, 200307)
cortical-effects-shifting-letter-position-letter-strings-varying.asp

15.

Effects of object shape and visual feedback on hand configuration during grasping.

Normal subjects gradually preshape their hands during a grasping movement in order to conform the hand to the shape of a target object. The evolution of hand preshaping may depend on visual feedback about arm and hand position as well as on target shape ...
Luis F Schettino, Sergei V Adamovich, Howard Poizner (Exp Brain Res, 200307)
effects-object-shape-visual-feedback-hand-configuration-grasping.asp

16.

The spatial tuning of chromatic adaptation.

A key question in colour research is how the colour and spatial analysis of an image interact. Traditionally, colour and form analysis have been regarded as parallel and separate processes, and documented effects of image complexity on chromatic ...
Annette Werner (Vision Res, 200307)
spatial-tuning-chromatic-adaptation.asp

17.

Localization of shapes: eye movements and perception compared.

The localization of spatially extended objects is thought to be based on the computation of a default reference position, such as the center of gravity. This position can serve as the goal point for a saccade, a locus for fixation, or the reference for ...
Dhanraj Vishwanath, Eileen Kowler (Vision Res, 200307)
localization-shapes-eye-movements-perception-compared.asp

18.

Visual comparisons within and between object parts: evidence for a single-part superiority effect.

Subjects judged whether two marks placed at different positions along a curved contour were physically the same. When targets were separated by a concave curvature extremum--corresponding to a part-boundary--decision latencies were longer than when they ...
Elan Barenholtz, Jacob Feldman (Vision Res, 200307)
visual-comparisons-object-parts-evidence-single-part-superiority.asp

19.

Voluntary head movement and allocentric perception of space.

Although visual input is egocentric, at least some visual perceptions and representations are allocentric, that is, independent of the observers vantage point or motion. Three experiments investigated the visual perception of three-dimensional object ...
Mark Wexler (Psychol Sci, 200307)
voluntary-head-movement-allocentric-perception-space.asp

20.

Object temporal connotation.

Recent studies show that what connotes an object is first of all a certain spatio-temporal structure. In this paper we describe some of the temporal features characterizing the temporal structure of objects: pre-existence, persistence, conservation of ...
Cristina Becchio, Cesare Bertone (Brain Cogn, 200307)
object-temporal-connotation.asp