title: Effects of laterality and visual angle on time judgments: a phenomenological investigation of time durations.
abstract: 20 students from an undergraduate class participated in an experiment designed to study the effects of laterality and visual angle on time judgments. Using a standard two-field tachistoscope , subjects were exposed to two experimental conditions, (1) stimulus cards with a single red or blue dot in the center and several dots clustered on both sides near the center and equidistant from it (visual angle of .6 degrees) and (2) stimulus cards with a single red or blue dot in the center and several dots clustered on both sides away from the center on the edge of the card (visual angle of 2.6 degrees). Five cards containing a single red or blue dot were used to control for response bias. The subjects were asked to indicate whether they saw dots in the left, right, or both fields, and whether they perceived a time duration between fields. No difference in time duration existed, however, as all cards were exposed to both fields for equal durations. The predictions that the judged duration of dot patterns would be more accurate favoring the left visual-field and more accurate where the distance between the point of fixation and stimulus was larger were supported.
mesh_terms: D000328:Adult; D003118:Color Perception; D004193:Discrimination Learning; D004292:Dominance, Cerebral; D005260:Female; D005556:Form Perception; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual; D013998:Time Perception; D014794:Visual Fields