Table 1.

Summary of stimulus preference assessment procedures

Stimulus preference assessment	Stimuli presented	Stimuli restricted	Stimuli removed	Stimuli replaced
Multiple stimulus without replacement (DeLeon & Iwata, 1996)	Multiple stimuli in an array	All but the selected stimulus	Selected stimulus removed after the postselection access	Selected stimulus not replaced
Paired choice (Fisher et al., 1992)	Stimuli pairs	Unselected stimulus	Selected stimulus removed after postselection access	Selected stimulus may be replaced in a new pair
Response restriction (Hanley, Hanley, Iwata, Lindberg, and Conners, 2003; Hanley, Iwata, Roscoe, et al., 2003)	All stimuli available	Unselected stimuli	Selected stimulus removed after postselection access	Selected stimulus not replaced
Single stimulus (Pace et al., 1985)	One stimulus	None	Stimulus removed after postselection access	Stimulus not replaced
Multiple stimulus with replacement (DeLeon & Iwata, 1996)	Multiple stimuli in an array	All but selected stimulus	Selected stimulus removed following postselection access	Selected stimulus replaced within the array
Free operant (Roane et al., 1998)	All stimuli available	None	Stimuli not removed during the assessment	Not applicable