Effects Of Blank Interruption On Visual Motion Direction Perception

Purpose: The perception of motion will be affected by inserting a blank frame, which is too short to recognize but interrupt normal visual motion sequency. We upgrated the Visual Motion Priming model proposed by Pantle, that means to insert a blank frame between priming and target. The goal is to explore the mechanism of visual motion priming in the brain.Method: Undergraduates on campus participated the experiments as paid volunter with normal or corelected normal version. Experiment One: A blank frame lasting 75ms inserted between two grating images which indicated a special direction or an ambiguous direction. The task of subjects was to judge the direction of the motion. Experiment Two: the paradigm was similar, but the blank frame lasts either 75ms or 40ms inserted between two grating images. Expriment Three: A priming - target paradigm was used. A blank frame lasting 75ms inserted between the priming and target jump. The task is to judge weacher direction of the two motion is same. Experiment Four: The sequency of stimuli is 3 condition: special (left/right) - ambiguous, special-same direction, and special - opposite. The duration of the blank frame is either 75ms or 40ms. The task is as same as Experiment Three. Results and Conclusion: 1) The reversion of the direction was caused by inserted a blank frame for the special motion rather than ambiguous motion. This reflects the interruption of blank frame on the normal visual mition. 2) The shorter of interruption duration, the more obvious interruption effects, and this support the motion opponency theroy. 3) The different intervals betweenpriming and target were detected. Due to interruption of blank frame, the shorter interruption elicited positive proming effects, which is consistant with integration of temporal and spatial in the human brain. 4) The negative of the same direction is relationship to visual adaption and visual inertia effects.