Motion adaptation shifts apparent position without the motion aftereffect

Percept Psychophys. 2003 Oct;65(7):1011-8. doi: 10.3758/bf03194830.

Abstract

Adaptation to motion can produce effects on both the perceived motion (the motion aftereffect) and the position (McGraw, Whitaker, Skillen, & Chung, 2002; Nishida & Johnston, 1999; Snowden, 1998; Whitaker, McGraw, & Pearson, 1999) of a subsequently viewed test stimulus. The position shift can be interpreted as a consequence of the motion aftereffect. For example, as the motion within a stationary aperture creates the impression that the aperture is shifted in position (De Valois & De Valois, 1991; Hayes, 2000; Ramachandran & Anstis, 1990), the motion aftereffect may generate a shift in perceived position of the test pattern simply because of the illusory motion it generates on the pattern. However, here we show a different aftereffect of motion adaptation that causes a shift in the apparent position of an object even when the object appears stationary and is located several degrees from the adapted region. This position aftereffect of motion reveals a new form of motion adaptation--one that does not result in a motion aftereffect--and suggests that motion and position signals are processed independently but then interact at a higher stage of processing.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Attention
  • Discrimination Learning
  • Eye Movements
  • Figural Aftereffect*
  • Fixation, Ocular
  • Habituation, Psychophysiologic
  • Humans
  • Motion Perception*
  • Optical Illusions*
  • Orientation*
  • Pattern Recognition, Visual*
  • Psychophysics
  • Reaction Time
  • Visual Fields