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Feigned depression and feigned sleepiness: a voice acoustical analysis.
Nicole Reilly1, Michael S Cannizzaro, Brian T Harel
1Department of Psychology, University of Connecticut, Storrs, CT, USA.
Brain and Cognition
|June 5, 2004
Summary
Individuals faking depression or sleepiness consciously altered their speech rate but not their pitch range. These voice acoustical correlates suggest limited conscious control over vocalizations when simulating these conditions.
Area of Science:
- Psychology
- Speech Science
- Acoustics
Background:
- Understanding the vocal characteristics of simulated psychological states is crucial for diagnostic and research purposes.
- Previous research has explored vocal biomarkers for various conditions, but feigned states require specific investigation.
Purpose of the Study:
- To profile the voice acoustical correlates of simulated depression.
- To identify the voice acoustical correlates of simulated sleepiness in healthy individuals.
Main Methods:
- Twenty-two healthy participants were instructed to simulate depression and sleepiness while performing speech tasks (free speech, counting, sustained vowel).
- Vocal recordings were analyzed for speaking rate and pitch range under normal, feigned sleepy, and feigned depressed conditions.
- Paired t-tests were used to compare acoustic parameters between conditions.
Main Results:
- Significant differences in speaking rates were observed between normal and feigned conditions (sleepy and depressed), but not between feigned sleepy and depressed conditions.
- No significant differences in pitch range were found between normal and feigned conditions (sleepy or depressed).
Conclusions:
- Individuals can consciously control their speech rate when feigning depression or sleepiness.
- Feigning depression or sleepiness did not convincingly alter vocal pitch range, suggesting limitations in conscious vocal modulation for these states.