A Sequential, Test-Control Methodology for Conducting Functional Analyses of Self-Injurious Behavior

Abstract

Multielement and reversal designs used to identify maintaining variables for behavior disorders such as self-injury have several potential limitations, including interaction effects (multielement), inefficiency (reversal), and lack of a continuous control (reversal). This article describes a methodology that minimizes these problems yet captures the best features of both designs. This design consists of several phases implemented in a sequential (A-B-C) fashion, as in the reversal design. However, each phase consists of two conditions, a test and a control, presented concurrently in a multielement format. Five subjects' self-injury was assessed using both the multielement design and the sequential, test-control (or pairwise) design. Results for two subjects indicated that the multielement design produced clear assessment outcomes, and similar findings were obtained using the pairwise design. For two other subjects, the multielement assessments were somewhat undifferentiated, and clearer results were obtained using the pairwise design. The fifth subject's self-injury showed cyclical patterns using both assessment techniques. Benefits and limitations of the sequential assessment methodology are discussed.

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