The Effects of Spatial Frequency and Temporal Waveform on Three Measures of Temporal Processing |
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| Authors: | James G May Frances Martin Finian MacCana William J Lovegrove |
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| Institution: | 1. Department of Psychology , University of New Orleans , USA;2. LSU Eye Center Louisiana State University School of Medicine , USA;3. Department of Psychology , University of Tasmania , USA |
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| Abstract: | 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 judgments. The stimuli were lateralized fields, separated by 1° 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. |
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