“…Empirical research on functional analysis and its approach to treatment has expanded recently to other clientele with a variety of behavior problems, including chronic food refusal (Munk & Repp, 1994), classroom appropriate and problem behavior (Dunlap et al, 1993;Kern, Childs, Dunlap, Clarke, & Falk 1994;Lewis & Sugai, 1996;Taylor & Romanczyk, 1994), cigarette pica (Piazza, Hanley, & Fisher, 1996), pica (Fisher et al, 1994;Mace & Knight, 1986;Piazza et al, 1998), bizarre speech , reluctant speech (Mace & West, 1986), diagnosis of a tic disorder (Carr, Taylor, Wallander, & Reiss, 1996), attention deficit hyperactivity disorder (DuPaul & Ervin, 1996;Ervin et al, 1998;Gulley & Northrup, 1997), behavior disorders (Blair, Umbreit, & Boss, 1999;Clarke et al, 1995), patients with Alzheimer's disease (Bakke et al, 1994), and schizophrenic delusions (Schock, Clay, & Cipani, 1998). For example, the conduct of an analysis of the behavioral function of the delusional statements of adults with schizophrenia provided the venue for the design of effective behavioral treatment for such statements (Schock et al, 1998).…”