Information used in detecting upcoming collisions.

R.J. Bootsma, Cathy Craig

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

In four experiments we examined the nature of the information used in judging whether events would or would not give rise to a collision in the near future. Observers were tested in situations depicting approaches between two objects (lateral approaches) and approaches between an object and the point of observation (head-on approaches), with objects moving according to constant deceleration or sinusoidal deceleration patterns. Judgments were found to be based, to a large extent, on the (in)sufficiency of current deceleration to avoid upcoming collision, as specified optically by tau-dot (tau over dot). However, the information specified, by tau (tau), that is the current (first-order) time remaining until contact, was also found to play a significant role. We deduce that judgment of upcoming collision is based on the detection Of T and its evolution over time, suggesting that observers are sensitive to Deltatau rather than to tau over dot itself.
Original languageEnglish
Pages (from-to)525-544
Number of pages20
JournalPerception
Volume32(5)
Issue number5
Early online date23 Apr 2003
DOIs
Publication statusPublished - 1 May 2003

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