Journal article

Sensitivity to the acceleration of looming stimuli

J Trewhella, M Edwards, MR Ibbotson

Clinical and Experimental Ophthalmology | BLACKWELL PUBLISHING ASIA | Published : 2003

Abstract

The aim of this study was to determine if observers could discriminate between looming stimuli simulating targets approaching the observers at either constant or non-constant speeds. Discrimination between accelerating and constant-speed approaches improved after 70-90 trials for accelerations >2 m/s2. For lower accelerations the ability to discriminate was poor regardless of the trial number. Following the learning phase, observers were able to identify accelerating targets from constant-speed approaches fairly consistently at performance levels of 70-75% for accelerations as low as 4 m/s2 and at 80-96% for accelerations of 6-14 m/s2. Observers' accuracy in identifying decelerating from con..

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