Sensitivity to relative and absolute motion.

Abstract:

:The threshold of sensitivity to movement could be governed by mechanisms that are sensitive either to change in spatial position, or directly to the movement itself. The use of spatially complex patterns (random-dot patterns) has been suggested to eliminate the former strategy allowing examination of the movement detecting mechanisms in isolation. By means of such a technique, thresholds for directional judgements were determined for patterns which underwent either a simple displacement or a shearing displacement. Thresholds for shearing motion were found to be around one half of those for simple motion, suggesting that relative, rather than absolute, motion governs performance for small displacements. This contrasts with previous experiments which showed that absolute motion governs performance for much larger displacements.

journal_name

Perception

journal_title

Perception

authors

Snowden RJ

doi

10.1068/p210563

keywords:

subject

Has Abstract

pub_date

1992-01-01 00:00:00

pages

563-8

issue

5

eissn

0301-0066

issn

1468-4233

journal_volume

21

pub_type

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