The taxonomy of affective dysprosodia in schizophrenia and its relation to acoustic cue perception: A preliminary investigation
2007 (English)In: Schizophrenia Bulletin, Vol. 33, no 2, 540- p.Article in journal (Refereed) Published
Affective dysprosodia, or deficits in the perception of emotion through vocal intonation, are an enduring aspect of schizophrenia that are linked to negative symptoms and predicted by sensory processing dysfunction. Yet the taxonomy or affective specificity in patient dysprosodia is unknown. Within prosody in particular, it has been difficult to disentangle emotion specific deficits from differences in emotion intensity perception. Prior research has shown that certain acoustical cues such as fundamental frequency (F0), voice intensity (VOint) and high frequency energy (HF-500) are highly predictive of decoding ability. Here, we examined patients’ perception of 5 basic emotions at differing intensity levels in conjunction with intensity ratings. Additionally, we examined the relationship between performance and intensity ratings and acoustical properties of the stimuli in an emotion specific manner. In a sample of 26 patients with schizophrenia/schizoaffective disorder and 17 healthy controls we found the following: Patient decoding was significantly worse for all affective classifications save angry, and there was no significant emotion x group interaction or intensity x group nteraction. Correlation analysis between affective decoding and the acoustic properties of the stimuli revealed that patients were significantly less sensitive to changes in F0sd, and that these differences contributed to differential decoding ability of happy, sad and fearful utterances. Analysis of affective decoding misattribution patterns revealed that patients and controls had generally the same types of misattribution errors, and further, that deviations from the control misattribution pattern were in part related to acoustic cue utilization. Finally, patient ratings of emotional intensity were slightly higher than those of controls. These results suggest that patients’ affective dysprosodia is not characterized by any experiential deficit or differences along arousal or valence dimensions but rather, stem from aberrant sensorial and cognitive processing.
Place, publisher, year, edition, pages
2007. Vol. 33, no 2, 540- p.
IdentifiersURN: urn:nbn:se:uu:diva-11157OAI: oai:DiVA.org:uu-11157DiVA: diva2:38925