A functional analysis (FA) was conducted with Jerry Thompson…

A functional analysis (FA) was conducted with Jerry Thompson and the results of the FA indicated that his physical aggression was maintained by attention.  A preference assessment was conducted, and it appeared that Jerry also would work for tangible toys. Jerry’s aggressive behavior was put on a DRO 5 minutes, or direct reinforcement of other behavior. Every 5 minutes John would get a token, which could be exchanged for toys, if he had not engaged in aggression for that interval. Sometimes, he exchanged his tokens for toys and other times his aggressive behavior delayed the delivery of tokens. Based on this example where a reinforcer not matched to the function behavior is delivered for successful completion of a DRO interval, or withheld for engaging in aggression,  this type differential reinforcement strategy involves combining which two principles of behavior?

You are concerned that the teacher of the child with whom yo…

You are concerned that the teacher of the child with whom you are working  may not follow the correct procedure for the experimental design that is explained to her because she fears withdrawing an effective treatment package.  As such, you would select a reversal design over a multiple baseline design.