title: Increasing vocal variability in children with autism using a lag schedule of reinforcement.
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.
authors.affiliation: Esch Behavior Consultants, Inc.
authors.forename: John W
authors.initials: JW
authors.lastname: Esch
authors.forename: Barbara E
authors.initials: BE
authors.lastname: Esch
authors.forename: Jessa R
authors.initials: JR
authors.lastname: Love