Increasing Vocal Variability in Children with Autism Using a Lag Schedule of Reinforcement |
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Authors: | Esch John W. Esch Barbara E. Love Jessa R. |
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Affiliation: | 17.Esch Behavior Consultants, Inc., P.O. Box 20002, Kalamazoo, Michigan, 49019, USA ;27.Western Michigan University, USA ; |
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Abstract: | Variability has been demonstrated to be an operant dimension of behavior (Neuringer, 2002; Page & Neuringer, 1985). Recently, lag schedules have been used to demonstrate operant variability of verbal behavior in persons with a diagnosis of autism (e.g., Lee, McComas, & Jawor, 2002). The current study evaluated the effects of a Lag 1 schedule on the vocal variability of 2 nonverbal children with a diagnosis of autism. Results showed systematic increases in variability during the Lag 1 schedule. Implications of lag schedules for speech and language training are discussed. |
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Keywords: | variability lag schedule verbal behavior autism speech delay echoic |
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