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Updated: May 23, 2026

Modeling Verbal Behavior Deficits with the Stimulus Control Ratio Equation, SCoRE
Published on: May 14, 2019
Transferring control of the mand to the motivating operation in children with autism
Emily J Sweeney-Kerwin1, Vincent J Carbone, Leigh O'Brien
1Carbone Clinic.
Abstract:
Few studies have made use of B. F. Skinner's (1957) behavioral analysis of language and precise taxonomy of verbal behavior when describing the controlling variables for the mand relation. Consequently, the motivating operation (MO) has not typically been identified as an independent variable and the nature of a spontaneous mand has been imprecisely described. The purpose of this study was to develop procedures to bring the mand response under the control of the relevant MO and therefore free it from the multiple controls that are more easily identified by practitioner's who rely on Skinner's analysis and taxonomy. Using a rolling time delay and prompt fade procedure both participants' mand repertoires were successfully transferred to the relevant MO and a listener and described within the context of a behavioral analysis of language.
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