An ABA'B design was used to evaluate the effects of choice on task engagement for 3 adults who had been diagnosed with traumatic brain injury. A yoked-control condition, in which tasks that were selected by each participant were assigned subsequently to that participant by a trainer, was implemented to help distinguish between the effects of task preference and choice. The results for all 3 participants indicated that permitting individuals to choose from a list of tasks increased on-task behavior.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2408344PMC
http://dx.doi.org/10.1901/jaba.2008.41-261DOI Listing

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