Original articleSensory Contributions to Impaired Prosodic Processing in Schizophrenia
Section snippets
Participants
Forty-three stable patients meeting DSM-IV criteria for either schizophrenia or schizoaffective disorder and 34 healthy control subjects volunteered to serve in this experiment. The Institutional Review Board of the Nathan Kline Institute for Psychiatric Research approved all experimental procedures, and all patients were recruited from facilities associated with the Institute. Written, informed consent was provided by all subjects after the procedures of the experiment were fully explained.
Between-Group Analyses
Tone Matching Task and DTT performance were obtained for patients only. Tone Matching Task performance is shown in Table 2 and is similar to that obtained in previous studies with similar patients (Javitt et al 1999, Rabinowicz et al 2000, Strous et al 1995). Mean performance across all five levels was 77 ± 14%. In a prior study in which we tested performance on the three middle levels of the five used in the present study (5%, 10%, and 20%) (Strous et al 1995), patients scored a mean of 72%
Discussion
The ability to decode other people’s emotional states by analyzing either their vocal intonations or facial expression is an integral part of human existence, leading to significant recent interest in this process in schizophrenia (e.g., Edwards et al 2002, Gur et al 2002, Suslow et al 2003). The present study demonstrates that patients with schizophrenia show significant impairments in the ability to decode affect based on either auditory vocal or visual facial cues, replicating previous work
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