Buildup and decay of a three-dimensional rotational aftereffect obtained with a three-dimensional figure.
Gaps in past literature have raised questions regarding the kinds of stimuli that can lead to three-dimensional (3-D) rotation aftereffects. Further, the characteristics of the buildup and decay of such aftereffects are not clear. In the present experiments, rotation aftereffects were generated by projections of cube-like stimuli whose dynamic perspective motions gave rise to the perception of rotation in unambiguous directions; test stimuli consisted of similar cubes whose rotation directions were ambiguous. In experiment 1, the duration of the adaptation stimulus was varied and it was found that the 3-D rotation aftereffect develops with a time constant of approximately 26 s. In experiment 2, the duration between adaptation and testing was varied. It was found that the 3-D rotation aftereffect has a decay constant of about 9 s, similar to that observed with 2-D motion aftereffects. Experiment 3 showed that the rotation aftereffects were not simple depth aftereffects. To account for these aftereffects and related data, a modification of an existing neural-network model is suggested.
Department of Psychology, Ripon College, WI 54971, USA. petersikt@ripon.edu
J Timothy
JT
Petersik
D000328:Adult; D003867:Depth Perception / Q000502:physiology*; D005260:Female; D005366:Figural Aftereffect; D006801:Humans; D008297:Male; D011601:Psychophysics; D012399:Rotation