Spatiotemporal properties of stereoacuity.
This study investigated the effects of spatial and temporal luminance variations on stereoacuity across three experiments. In Experiment 1, the effect of counterphase flicker on performance was examined at five spatial frequencies. Flicker impaired performance at a high spatial frequency, whereas it improved performance at a low spatial frequency. In Experiment 2, the effect of sustained vs. transient temporal modulation on performance was investigated at four spatial frequencies. Relative to sustained modulation, transient modulation impaired performance at high spatial frequencies, but it affected performance little at low spatial frequencies. In Experiment 3, the effect of exposure duration on performance was examined at three spatial frequencies. Decreasing duration impaired performance at a high spatial frequency, but it affected performance less at low spatial frequencies. These results show that spatial and temporal variables interact to govern stereoacuity performance; stereoacuity is good only when tested with high spatial- and low temporal-frequencies.
Patterson
R
R
Department of Psychology, Montana State University, Bozeman.
D003867:Depth Perception / Q000502:physiology*; D006801:Humans; D008029:Lighting; D015357:Vision Disparity / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology*