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Acoustic Analysis: An Objective Measure of Affective Flattening
Journal article

Acoustic Analysis: An Objective Measure of Affective Flattening

Nancy C Andreasen, Murray Alpert and Merrill J Martz
Archives of general psychiatry, Vol.38(3), pp.281-285
03/01/1981
DOI: 10.1001/archpsyc.1981.01780280049005
PMID: 7212958

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Abstract

• Acoustic analysis of voice patterns is an objective means of evaluating flatness of affect. Thirty-one patients defined as having flat affect by a reliable rating scale were compared with 30 patients who were not flat. The hypothesis that flat patients display monotonic speech was confirmed, for these patients showed less variance in both the amplitude and frequency of their speech than the nonflat patients.

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