College of Psychology: Faculty Articles

Title

Stopping eye and hand movements: Are the processes independent?

Document Type

Article

Publication Date

1-1-2007

Publication Title

Perception and Psychophysics

ISSN

0031-5117

Volume

69

Issue/No.

5

Abstract

To explore how eye and hand movements are controlled in a stop task, we introduced effector uncertainty by instructing subjects to initiate and occasionally inhibit eye, hand, or eye + hand movements in response to a color-coded foveal or tone-coded auditory stop signal. Regardless of stop signal modality, stop signal reaction time was shorter for eye movements than for hand movements, but notably did not vary with knowledge about which movement to cancel. Most errors on eye + hand stopping trials were combined eye + hand movements. The probability and latency of signal respond eye and hand movements corresponded to predictions of Logan and Cowan's (1984) race model applied to each effector independently.

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