Accession Number:

ADA445385

Title:

Visual and Auditory Sensitivities and Discriminations

Descriptive Note:

Final rept. 1 Jan 2004-31 Dec 2005

Corporate Author:

YORK UNIV TORONTO (ONTARIO) OFFICE OF RESEARCHES SERVICES

Personal Author(s):

Report Date:

2005-12-31

Pagination or Media Count:

51.0

Abstract:

We decoupled the direction and speed of simulated self-motion in depth from the direction and speed of simulated object motion in depth. We found that objects with the same closing speed were perceived to have a higher closing speed when self-motion and object-motion were in the same direction and a lower closing speed when they were in opposite directions. In addition, the perceived direction of an approaching objects motion in depth was shifted towards the focus of the radially-expanding flow pattern caused by self-motion. These findings suggest that the large body of research on motion perception for stationary observers has limited relevance to situations in which both the observer and the object are moving. We describe evidence that the adaptation to closing speed effect that we reported previously causes potentially dangerous misjudgments when turning left across oncoming traffic. In particular, decisions are delayed and more variable. We have written am empiricaltheoretical review of research on collision avoidanceachievement. We report evidence that practice can change the interaction between different visual variables in visually-guided action.

Subject Categories:

  • Psychology
  • Anatomy and Physiology
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE