The spatial spread of attentional modulation of the motion aftereffect.

Abstract:

:The spatial spread of attentional modulation of selective adaptation was investigated in four experiments in which the duration of the movement aftereffect (MAE) was measured with and without processing of intermittently changing digits at the fixation point. In the first experiment, the effects of diverting attention on MAE duration were found to reduce as the distance between the fixation digits and the inner edge of the surrounding adapt/test grating was increased. A second experiment suggested that eye movements were unlikely to underlie the attentional effects. In experiment 3, the attentional effect stayed constant as the outer diameter of the adapt/test gratings was increased. In experiment 4 (as in experiment 1) the modulatory effects of attention were larger the closer the adapt/test gratings were to the locus of attention, when the area of the grating was held constant but its eccentricity varied. In experiments 1 and 4, an intermittently changing fixation digit was found to reduce MAE durations more than an unchanging digit, even when subjects were not required to process it, suggesting that exogenous as well as endogenous attentional processes modulate early motion processing.

journal_name

Perception

journal_title

Perception

authors

Georgiades MS,Harris JP

doi

10.1068/p3023

keywords:

subject

Has Abstract

pub_date

2000-01-01 00:00:00

pages

1185-201

issue

10

eissn

0301-0066

issn

1468-4233

journal_volume

29

pub_type

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