Many of her verbalizations were words and phrases without any obvious “meaning.” Hence, her parents and staff members defined a relatively small part of Marie's repertoire of verbal behavior as adequate or rational, and a major part of her verbal repertoire was characterized as aberrant, “delusional,” or “psychotic” verbal responses. She lived in a group home and 5 days a week she attended a day placement center for people with disabilities. Marie, a 24-year-old woman diagnosed with autism, participated in the current study. Finally, we wanted to increase the participant's rational verbal behavior by establishing other people as sources of different types of reinforcement.
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We also wanted to establish a more consistent relationship between a variety of verbal responses and proper controlling variables (e.g., establish audience/listener as a controlling variable). Second, we aimed to increase the participant's listening behavior by teaching her to react appropriately to verbal stimuli and reinforce her speaking behavior. (2006) that is, to train different classes of verbal behavior in order to reduce aberrant verbal behavior. The main purpose of the present study was to replicate the study by Arntzen et al. A recent study with an adult with mental retardation suggested the effectiveness of establishing a verbal repertoire consisting of different verbal operants in order to reduce the duration and rate of aberrant verbal behavior ( Arntzen, Ro Tonnessen, & Brouwer, 2006). Nevertheless, behavioral research on aberrant verbal behavior has repeatedly demonstrated overt social operant features ( Lancaster et al., 2004 Mace, Webb, Sharkey, Matson, & Rosen, 1988).
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Aberrant speech is often considered to be symptomatic of an underlying mental illness such as schizophrenia or other psychotic conditions.
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Aberrant verbal responses have been labeled as stereotyped (repetitive words or phrases, or perseveration on the same subject), echolalic (persistent repetition of words or phrases of others), delusional (obviously false statements), psychotic (responses unrelated to ongoing environmental events) or hallucinatory (responses to unobservable stimuli) ( Ewing, Magee, & Ellis, 2002 Wilder, Masuda, O'Connor, & Baham, 2001).