Apparent shift in long-range motion trajectory by local pattern orientation

作者：Nakayama Ryohei^*; Harada Daisuke; Kamachi Miyuki G; Motoyoshi Isamu

来源：Scientific Reports, 2018, 8(1): 774.

DOI：10.1038/s41598-017-19005-2

The present study shows that the apparent direction of a moving pattern is systematically affected by its orientation. We found that the perceived direction of motion of a single Gabor grating changing position in discrete steps interleaved by blank inter-stimulus interval (ISI) is biased toward the orientation of the grating. This orientation-induced motion shift peaks for grating orientations -+/- 15 deg away from the physical motion trajectory and was profound for relatively short distances. Orientation adaptation revealed that the directional shift is determined by the apparent-not the physical-orientation of the grating, and a subsequent experiment demonstrated that directional shift is also influenced by the orientation of the contrast-defined stimulus envelope. Results provide further evidence that the apparent trajectory of a motion stimulus is determined by interactions between motion and pattern information at relatively high levels of visual processing.

• 出版日期2018-1-15