“…However, this hypothesis was not directly tested, and consequence-based intervention was not directly applied to dysfunctional verbal behavior. Other studies have demonstrated that contingency-based interventions, sometimes in combination with other behavioral interventions such as prompting, reduce psychotic speech and may increase appropriate speech in people diagnosed with psychotic disorders (Bartlett, Ora, Brown, & Downloaded by [University of California Santa Cruz] at 07:08 05 January 2015 Butler, 1971;Belcher, 1988;Liberman, Teigen, Patterson, & Baker, 1973;Reichle, Brubakken, & Tetreault, 1976;Schraa, Lautmann, Luzi, & Screven, 1978;Wincze, Leitenberg, & Agras, 1972). More contemporary studies have demonstrated that psychotic verbal behavior can be functionally analyzed and the results of these functional analyses can be used to design effective treatments (Wilder, Masuda, O'Connor, & Baham, 2001;Wilder & Wong, 2007).…”