Play
Control condition, enriched environment with lots of attention available, no demands and no attention for SIB
Social disapproval
Therapist provides toys but no structure, attends to subject only contingent upon self-injury, makes statements of concern
Academic demand
Periodic prompts are given to work. Self injury results in termination of the demand
Alone
Subject is observed covertly and is alone
Experimental designs used to analyze functional analysis data
Reversal (abab) and multielement (alternating treatment)