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Behavior Modification
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*Child Behavior Disorders
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Effects of Increased Response Effort and Reinforcer Delay on Choice and Aberrant Behavior

Michelle M. Gwinn

Gonzaga University

K. Mark Derby

Gonzaga University

Wayne Fisher

Johns Hopkins School of Medicine

Patricia Kurtz

Johns Hopkins School of Medicine

Angela Fahs

Johns Hopkins School of Medicine

Mary Augustine

Johns Hopkins School of Medicine

T. F. McLaughlin

Gonzaga University

A four-phase investigation was completed to analyze the utility of forced-choice preference assessments when response effort and reinforcer delays are altered within a subsequent reinforcer assessment. The results indicated that access to highly preferred stimuli continued to serve as a reinforcer when increased response effort was required. When reinforcer delay was increased, the utility of preferred stimuli to serve as a reinforcer was variable. Despite stimuli continuing to serve as reinforcers for academic task engagement, increased response effort and reinforcer delay resulted in an increased level of aberrant behavior.

Key Words: reinforcer assessment • matching law

Behavior Modification, Vol. 29, No. 4, 642-652 (2005)
DOI: 10.1177/0145445503259489
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