Publications by authors named "Jeffrey M Chan"

Objective: To use a preference assessment to identify the preferred language of instruction (English or Spanish) for a child with autism living in a Spanish-speaking home and receiving school services in English only.

Methods: We used a concurrent chains method to evaluate the participant's preference for English or Spanish instruction. Colored microswitches represented English instruction, Spanish instruction and no instruction (control).

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Objective: Analyse the effects of a weighted vest on the aggressive and self-injurious behavior of a young boy with autism.

Methods: The effects of the weighted vest were examined during a functional analysis utilizing an ABAB design with an embedded multielement design, in which the participant wore a five pound weighted vest or no vest.

Results: The results do not suggest the existence of a functional relationship between the use of a weighted vest and challenging behavior, as the weighted vest had no marked effect on levels of aggression and self-injurious behavior.

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Fragile X syndrome is the most common inherited cause of intellectual and developmental disability. The influence of environmental variables on behaviors associated with the syndrome has received only scant attention. The current study explored the function served by problem behavior in fragile X syndrome by using experimental functional analysis methodology with 8 children with fragile X.

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Preferences of 2 children with developmental disabilities, whose functional analyses indicated that their problem behavior was maintained by access to tangible items, were assessed using three formats (i.e., paired stimulus [PS], multiple-stimulus without replacement [MSWO], and free operant [FO]).

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Functional analyses that were conducted in two settings (playground and classroom) indicated that problem behavior was sensitive to adult attention on the playground and tangible items in the classroom. Attention- and tangible-based interventions were designed based on the results from each of the assessment environments and were compared. The attention-based intervention was more effective on the playground, and the tangible-based intervention was more effective in the classroom.

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A preliminary evaluation of the correspondence between functional analysis outcomes across settings was conducted with 2 children who had been diagnosed with autism and who engaged in challenging behavior. Differences across settings (a therapy room and a classroom) were demonstrated in ABAB reversal designs. Three potential patterns of results that may occur when comparing functional analyses across environments are described, and one possible explanation for the occurrence of discrepancies between environments (differing learning histories within separate environments) is offered.

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A Social Stories intervention package was used to teach 2 students with autism to read Social Stories, answer comprehension questions, and engage in role plays. Appropriate social behaviors increased and inappropriate behaviors decreased for both participants, and the effects were maintained for up to 10 months. This intervention package appears to be useful in inclusive classroom environments and does not require intensive supervision of the child's behavior.

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The purpose of this study was to evaluate the effects of enhanced milieu teaching when combined with a voice output communication aid on the requesting skills of three children with autism. The research design was a multiple probe across participants. All sessions were conducted during 5-min play sessions in the child's classroom.

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