Departmental Bulletin Paper Minimum temporal thresholds for discriminating changes in motion direction

Tayama, Tadayuki  ,  Sato, Fumiaki

11pp.37 - 53 , 2016-03 , 北海道大学文学研究科
ISSN:1880-8832
NCID:AA12118273
Description
Minimum temporal thresholds(Tmin)for discriminating motion direction were measured in various conditions. The results of Experiment 1 showed that Tmin for the change from a stationary pattern to a moving pattern was shorter than that for the abrupt appearance of a moving pattern. The time needed to process the pattern explained this difference. The results of Experiment 2 showed that Tmin for the change from a stationary pattern to a moving pattern was shorter than that for the directional change of a moving pattern. Furthermore,Tmin for discriminating a directional change with a 90 deg difference was shorter than that of 45 and 135 deg. In addition,an anisotropy in discriminating motion direction was observed between oblique-upward and oblique-downward directions. The validity of mathematical models that explain these results was discussed.
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