NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Dual-task performance with ideomotor-compatible tasks: is the central processing bottleneck intact, bypassed, or shifted in locus?The present study examined whether the central bottleneck, assumed to be primarily responsible for the psychological refractory period (PRP) effect, is intact, bypassed, or shifted in locus with ideomotor (IM)-compatible tasks. In 4 experiments, factorial combinations of IM- and non-IM-compatible tasks were used for Task 1 and Task 2. All experiments showed substantial PRP effects, with a strong dependency between Task 1 and Task 2 response times. These findings, along with model-based simulations, indicate that the processing bottleneck was not bypassed, even with two IM-compatible tasks. Nevertheless, systematic changes in the PRP and correspondence effects across experiments suggest that IM compatibility shifted the locus of the bottleneck. The findings favor an engage-bottleneck-later hypothesis, whereby parallelism between tasks occurs deeper into the processing stream for IM- than for non-IM-compatible tasks, without the bottleneck being actually eliminated.
Document ID
20050184662
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lien, Mei-Ching
(NASA Ames Research Center Moffett Field, CA United States)
McCann, Robert S.
Ruthruff, Eric
Proctor, Robert W.
Date Acquired
August 23, 2013
Publication Date
February 1, 2005
Publication Information
Publication: Journal of experimental psychology. Human perception and performance
Volume: 31
Issue: 1
ISSN: 0096-1523
Subject Category
Behavioral Sciences
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available