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Are affective prosodic deficits evident in bipolar disorder?

Published online by Cambridge University Press:  24 June 2014

A O'Regan,
SL Rossell and
NR Joshua
A O'Regan
Affiliation:
Mental Health Research Institute of Victoria, Melbourne, Australia
SL Rossell
Affiliation:
Mental Health Research Institute of Victoria, Melbourne, Australia
NR Joshua
Affiliation:
Mental Health Research Institute of Victoria, Melbourne, Australia
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Abstract

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Information

Type
Abstracts from ‘Brainwaves’— The Australasian Society for Psychiatric Research Annual Meeting 2006, 6–8 December, Sydney, Australia
Information
Acta Neuropsychiatrica , Volume 18 , Issue 6 , December 2006, pp. 302
Copyright
Copyright © 2006 Blackwell Munksgaard

Background:

Deficits in affective prosodic processing have been well established in patients with schizophrenia. Yet, no study has examined this skill in a bipolar sample, this was the aim of the current study.

Methods:

Three matched groups (patients with bipolar disorder, patients with schizophrenia and healthy controls) completed four affective prosody tasks from the Comprehensive Affective Testing System (CATS); emotional prosody discrimination (EPD), name emotional prosody (NEP), attend to prosody during conflicting prosody (CPP) and attend to meaning during conflicting prosody (CPM).

Results:

No significant group effects were found for any of the four tasks on either correct reaction time (RT) or accuracy measures. A task effect, however, was found across all four tasks showing a similar pattern for the RT (correct) and accuracy data; superior performance on EPD, then CPP, followed by NEP then CPM.

Conclusions:

The lack of group differences for each of the four tasks may be a reflection of the CATS paradigms lacking the capacity to effectively discriminate subtle differences in performance. An extensive literature indicates that individuals with schizophrenia and bipolar disorder do tend to perform worse on a range of affect tasks that use fearful and sad stimuli. Therefore, the lack of significant group effects in the current tasks may be because of an insufficient number of stimuli per affective category used in each task, thus poor power; alternatively, incongruent accent must be considered, that is, CATS uses American not Australian actors. Further study is recommended using experimental measures of affective prosody.