Effects of Simultaneous Script Training on Use of Varied Mand Frames by Preschoolers with Autism

Evaluation of a Treatment Package to Increase Mean Length of Utterances for Children with Autism

Skinner's (1957) classification of mand responses has spawned decades of research related to teaching individuals with developmental disabilities. However, few studies have evaluated how to teach individuals with autism to progress from simple to more complex mands for desired items and activities. The present study used a treatment package consisting of errorless teaching, differential reinforcement, and systematic decision rules to increase the number of words per mand utterance used by 6 children with autism. Daily probes were conducted in the absence of prompting and differential reinforcement throughout every stage of the treatment. Results showed that all children showed significant developmental gains in the mean length of utterances. Increased rates of manding, increased emission of mand frames, and decreased instances of indicating responses (i.e., pointing, reaching) in the absence of mands were also observed. Implications regarding the feasibility of intensive mand training in practice are discussed.

Replication and Extension of the Effects of Lag Schedules on Mand Variability and Challenging Behavior During Functional Communication Training

More is known about how to reduce challenging behavior with functional communication training (FCT) than how to mitigate its resurgence during or following a course of treatment. Research suggests reinforcing mand variability during FCT may mitigate the resurgence of challenging behavior, but validated procedures for reinforcing mand variability are limited and poorly understood. Lag schedules can reinforce variability in verbal behavior such as manding in individuals with autism, but studies have been largely limited to nonvocal mand modalities. Therefore, in the current study, we further evaluated the effects of FCT with lag schedules on vocal mand variability and challenging behavior in children with autism. The results suggest lag schedules alone or in combination with response prompt-fading strategies during FCT can increase mand variability and expand mand response classes but may fail to produce clinically significant reductions in challenging behavior.

Choice for reinforced behavioral variability in children with autism spectrum disorder

Although individuals with autism spectrum disorder (ASD) tend to behave repetitively, certain reinforcement contingencies (e.g., lag schedules) can be used to increase behavioral variability. In a lag schedule, reinforcers only follow responses that differ from recent responses. The present study was designed to promote variable play behavior in preschoolers with ASD interacting with playsets and figurines and to assess preference for variability and repetition contingencies. Data have shown a preference for variability in pigeons and college students, but this effect has not been explored in clinical populations. In this experiment, preschoolers with ASD were taught to discriminate between variability and repetition contingencies. Only play behaviors that met a lag schedule were reinforced in the presence of one color, and only repetitive behaviors were reinforced in the presence of another. After differential performance was established, participants experienced a concurrent chains schedule. Participants chose between the colors taught in training and then completed a play session with the selected contingency. One participant selected variability and repetition equally. The other participants showed a slight preference for variability. These results indicate that some individuals with ASD may play repetitively, not because they prefer repetition, but because they require additional teaching to play variably.

Increasing Verbal Interaction in Children with Autism Spectrum Disorders Using Audio Script Procedure

This study aimed at investigating the effectiveness of audio script and script-fading procedure in teaching initiation to children with ASD. Three children with ASD and a parent of each child participated in the study. A nonconcurrent multiple baseline design across children was used. The findings showed that the initiation emitted by the children increased during audio script and script-fading procedure. Children also generalized initiation across different conditions and maintained the acquired skills. Finally, the social validity findings showed that the opinions of the parents regarding the procedure were overall positive. Results were discussed in terms of recommendations for practitioners and future research.

Producing mands in concurrent operant environments

This study examined strategies designed to increase the rate of targeted, low-probability mands in a concurrent operant environment. We examined the effects of schedule manipulations, prompt manipulations, motivating operation manipulations, and combined behavioral process manipulations. Increases in target mands were produced for all 8 participants. Schedule manipulations were effective in producing increased rates of targeted mands for 3 of 8 participants, whereas prompt manipulations were effective for 4 of 8 participants. Motivating operation manipulations were effective in producing increased rates of targeted mands for 2 of 8 participants and combined behavioral process manipulations were effective for the single participant exposed to the combination.

Effects of a Lag Schedule with Progressive Time Delay on Sign Mand Variability in a Boy with Autism

For some children with autism, mand training can produce highly repetitive manding unless the environment is arranged in a manner that promotes mand variability. Prior research demonstrated that mand training using a lag schedule and progressive time delay increased variability in vocal manding in children with autism. Whether lag schedules have similar effects on sign mand topographies is unknown. The current study evaluated the effects of mand training with a Lag 1 schedule of reinforcement and progressive time delay (TD) on topographical variability and the development of a sign mand response class hierarchy in a boy with autism. The results suggest independent use of all sign mand topographies occurred, a mand response class hierarchy was developed, and topographically variant sign manding increased under the Lag 1 + TD schedule compared to a Lag 0 schedule of reinforcement. Implications for practitioners, limitations, and directions for future research are discussed.

Effects of a lag schedule of reinforcement with progressive time delay on topographical mand variability in children with autism

OBJECTIVE

Evaluate the effects of a Lag 1 schedule of reinforcement and progressive time delay (TD) on topographical mand variability in children with autism.

METHODS

Using single-subject design methodology, a multiple baseline across behaviors with embedded reversal design was employed. During Lag 0, reinforcement was delivered contingent on any independent instances of manding. During Lag 1 + TD, prompts were faded and reinforcement was delivered contingent on independent or prompted variant mand topographies.

RESULTS

Higher levels of topographical mand variability were observed during Lag 1 + TD for both participants.

CONCLUSIONS

A Lag 1 schedule of reinforcement with progressive TD increased variability across functionally equivalent vocal mand topographies for both participants. This finding extends prior literature by providing a novel model for studying reinforced mand variability in children, and by demonstrating how practitioners could use prompts and differential reinforcement to increase topographical mand variability in children with autism.

Empirical Application of Skinner's Verbal Behavior to Interventions for Children with Autism: A Review

Sundberg and Michael (2011) reviewed the contributions of Skinner's (1957) Verbal Behavior to the treatment of language delays in children with autism spectrum disorder (ASD) and discussed several aspects of interventions, including mand training, intraverbal repertoire development, and the importance of using Skinner's taxonomy of verbal behavior in the clinical context. In this article, we provide an update of Sundberg and Michael's review and expand on some discussion topics. We conducted a systematic review of studies that focused on Skinner's verbal operants in interventions for children with ASD that were published from 2001 to 2017 and discussed the findings in terms of journal source, frequency, and type of verbal operant studied.