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The Crespi Effect: A Replication

The Crespi Effect: A Replication Psychological Reports, 1962, 11, 25-26. @ Southern Universities Press 1962 VINCENT DI LOLL0 AND JAMES LUMSDEN University of IVestern Australia If a group of rats is trained to run along a runway until performance the amount of reward is generally reaches an asymptotic level, an increment in followed by an increment in performance greater than one would predict on the basis of the new level of reinforcement. Crespi ( 1942) named this pattern of results "elation effect." The corresponding excessive decrement in per- formance obtained following a decrement in incentive amount has been named "depression effect" (Gesgi, 1942). The genuineness of elation effects has been questioned by Spence (1956) on the ground that they could be attributed to increments in performance due to post-shift practice. Crespi did not continue to run his controls during the post-shift period. This inappropriate design has been followed in a number of subsequent studies (Zeaman, 1949; Spence, 1956). This report describes a replication of Crespi's srudy using appropriate controls instead of extrapolated vdues during the post-shift period. Five groups (A, B, C, D, E), each of 6 male, hooded rats (3 mo.), were run on a 10-ft. straight runway as described by Crespi ( http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Psychological Reports SAGE

The Crespi Effect: A Replication

Di Lollo, Vincent; Lumsden, James
Psychological Reports , Volume 11 (1): 2 – Aug 1, 1962
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References (3)

Publisher
SAGE
Copyright
© 1962 SAGE Publications
ISSN
0033-2941
eISSN
1558-691X
DOI
10.2466/pr0.1962.11.1.25
Publisher site
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Abstract

Psychological Reports, 1962, 11, 25-26. @ Southern Universities Press 1962 VINCENT DI LOLL0 AND JAMES LUMSDEN University of IVestern Australia If a group of rats is trained to run along a runway until performance the amount of reward is generally reaches an asymptotic level, an increment in followed by an increment in performance greater than one would predict on the basis of the new level of reinforcement. Crespi ( 1942) named this pattern of results "elation effect." The corresponding excessive decrement in per- formance obtained following a decrement in incentive amount has been named "depression effect" (Gesgi, 1942). The genuineness of elation effects has been questioned by Spence (1956) on the ground that they could be attributed to increments in performance due to post-shift practice. Crespi did not continue to run his controls during the post-shift period. This inappropriate design has been followed in a number of subsequent studies (Zeaman, 1949; Spence, 1956). This report describes a replication of Crespi's srudy using appropriate controls instead of extrapolated vdues during the post-shift period. Five groups (A, B, C, D, E), each of 6 male, hooded rats (3 mo.), were run on a 10-ft. straight runway as described by Crespi (

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Psychological Reports – SAGE

Published: Aug 1, 1962

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