Evaluation of the high-probability instructional sequence to increase compliance with multiple low-probability...

The high-probability (high-p) instructional sequence typically consists of the delivery of a series of high-p instructions immediately followed by the delivery of a low-probability (low-p) instruction and is a commonly used procedure to increase compliance among children with intellectual disabilities. In the current study, we used withdrawal designs to evaluate the use of the high-p sequence to increase compliance with a series of 2 or 3 low-p instructions among 3 children with autism. The sequence was moderately effective in increasing compliance with all low-p instructions for 2 participants. Compliance exhibited by the 3rd participant, for whom the high-p sequence was ineffective, increased when differential reinforcement was delivered. We discuss the utility of the high-p sequence to increase compliance with multiple instructions and the putative mechanisms responsible for the effects of the sequence.