The effects of spatial frequency and temporal waveform on three measures of temporal processing.
The effects of spatial frequency and temporal transition of sine-wave grating onset and offset were assessed using measures of reaction time, visual persistence, and temporal order judgements. The stimuli were lateralized fields, separated by 1 degree of visual angle. Slow temporal transition resulted in significantly poorer performance than did abrupt onset and offset, but spatial frequency had a minimal effect. Thus, the latency, temporal resolution, and temporal ordering of events are mediated by a mechanism that is sensitive to abrupt temporal transients. The stimulus conditions employed did not result in a shift in the point of subjective simultaneity.
May
J G
JG
Department of Psychology, University of New Orleans.
Martin
F
F
MacCana
F
F
Lovegrove
W J
WJ
D001288:Attention; D005556:Form Perception; D006801:Humans; D009949:Orientation; D010364:Pattern Recognition, Visual; D011601:Psychophysics; D011930:Reaction Time; D013998:Time Perception