Parallel processing in overlapping tasks: A model and a method
De Jong, Ritske
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Permalink
https://hdl.handle.net/2142/19589
Description
Title
Parallel processing in overlapping tasks: A model and a method
Author(s)
De Jong, Ritske
Issue Date
1991
Doctoral Committee Chair(s)
Coles, Michael G.H.
Department of Study
Psychology
Discipline
Psychology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Psychology, Experimental
Language
eng
Abstract
A dual-bottleneck model for parallel performance of reaction-time tasks in the psychological refractory period paradigm was developed. The first, preparation-based bottleneck prevents perceptual and decisional processes in the second task from operating in parallel with the first task when these processes require specific and explicit preparation. The second bottleneck prevents two independent responses from being initiated and executed in arbitrarily close succession, with the effective strength of this bottleneck depending on response similarity. The response-initiation bottleneck was manipulated in a series of experiments to demonstrate that this bottleneck is responsible for many of the underadditive interactions in overlapping-task performance that have previously been held to indicate parallel processing. A new method was developed to assess the extent and nature of parallel processing in overlapping tasks more reliably and in more detail. This method may also provide an important tool in the investigation of the adaptive control of human information processing.
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