Problem behavior during preference assessments: an empirical analysis and practical recommendations.

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]).

The effects of enhanced milieu teaching and a voice output communication aid on the requesting of three children with autism.

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.