Point-of-time effects across the semester: Is there a sampling bias?

    Authors

    A. Y. Wang;F. G. Jentsch

    Comments

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    Abbreviated Journal Title

    J. Psychol.

    Keywords

    PSYCHOLOGY SUBJECT POOL; PERFORMANCE; VALIDITY; UNIVERSITIES; COGNITION; SCALE; NEED; Psychology, Multidisciplinary

    Abstract

    Prior research has yielded inconsistent findings regarding differences between university participant-pool students who volunteer early or late in the semester. This issue is important because external validity may be threatened when researchers take samples from university participant pools. In the present study, point-of-time effects were investigated via measures of procrastination, motivation, locus of control, and cued recall. The findings suggest that slight differences exist between early and late volunteers on some measures of personality and motivation; however, there were no point-of-time effects for cued recall. The data indicate that if performance-based measures (e.g., cued recall) are under investigation, potential differences in personality and motivation may be attenuated because of the demand characteristics of laboratory settings.

    Journal Title

    Journal of Psychology

    Volume

    132

    Issue/Number

    2

    Publication Date

    1-1-1998

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    211

    Last Page

    219

    WOS Identifier

    WOS:000072418700007

    ISSN

    0022-3980

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