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    Deleterious effects of intermittent interruptions on the task performance of knowledge workers: A laboratory investigation.

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    Author
    Coraggio, Louis
    Issue Date
    1990
    Keywords
    Business administration
    Advisor
    Aquilano, Nicholas J.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Contemporary businesses compete in a highly reactive marketplace that demands a new breed of sophisticated knowledge workers. Managing these valuable people requires understanding the effects of their work environment on productivity. Frequent interruptions are an integral part of the knowledge worker's day. In this laboratory study, two attributes of interruption, frequency and length, are examined in conjunction with two levels of task complexity. A 2 x 2 x 2 factorial design with a control group for each level of task complexity resulted in ten unique treatments. Using personal computers, 122 student subjects from undergraduate courses in production management, took a practice, multiple-choice examination (the primary task) over course material. All subjects were allowed exactly 45 minutes to work on the primary task. Interruption episodes of trivia questions were generated at random intervals. Subjects were interrupted either two or six times with interruption lengths of either 30 seconds or 120 seconds. Performance on the primary task is measured using a point scoring system. A post experiment questionnaire was used to validate experiment manipulations. Using a multiple regression approach to analysis of covariance, approximately 70% of variance in performance is explained. Final models include a covariate for prior classroom performance. Four significant conclusions emerged from the analysis: (1) In the high complexity version of the primary task, short interruptions result in an average performance reduction of 44% relative to control subjects. (2) For the low complexity task, long interruptions result in an 11% average performance improvement over control subjects. (3) Performance in long interruption treatments is significantly better than performance under short interruption treatments for both levels of task complexity. (4) No consistent effects for frequency of interruption occur at the levels used in the study.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Business Administration
    Graduate College
    Degree Grantor
    University of Arizona
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    Dissertations

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