Adapting to expansion increases perceived time-to-collision

R. Gray, D. Regan

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


We used a tracking method to measure errors in estimating absolute time-to-collision caused by adapting to an expanding target. After adaptation, the estimated time-to-collision was longer than in the baseline condition. This was the case whether estimates were based on binocular information alone or monocular information alone. Estimates of time-to-collision were lengthened by 8-16% when based on binocular information alone, and by 18-25% when based on monocular information alone. These findings are consistent with a previous proposal that changing-size and changing-disparity information converge before the stage at which motion-in-depth signals are generated. Copyright (C) 1999 Elsevier Science Ltd.

Original languageEnglish (US)
Pages (from-to)3602-3607
Number of pages6
JournalVision Research
Issue number21
StatePublished - Oct 1999
Externally publishedYes


  • Binocular vision
  • Collision avoidance
  • Looming
  • Motion perception
  • Stereomotion
  • Time-to-collision

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

Cite this