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Related Experiment Videos

Hemispheric performance in detecting prosody: a competitive dichotic listening task.

J V Herrero1, W A Hillix

  • 1Department of Psychology, San Diego State University, CA 92182-0350.

Perceptual and Motor Skills
|October 1, 1990
PubMed
Summary

This study found that the left ear is better at identifying emotional speech tones, supporting the right-hemisphere model of affective prosody processing. Sadness was the most difficult emotion to identify, especially when presented to the right ear.

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Area of Science:

  • Neuroscience
  • Psycholinguistics
  • Auditory Perception

Background:

  • The right hemisphere is hypothesized to play a dominant role in processing emotional aspects of speech (affective prosody).
  • Previous models, such as Ross's 1981 model, suggest specific hemispheric lateralization for emotional speech comprehension.

Purpose of the Study:

  • To investigate the validity of Ross's 1981 model of right-hemisphere processing for affective speech components.
  • To examine ear advantages in the dichotic listening paradigm for identifying emotional prosody.

Main Methods:

  • Utilized a dichotic listening paradigm with 90 college students (45 male, 45 female).
  • Presented sentences with constant semantic content but varying emotional tones (mad, sad, glad).
  • Controlled stimulus duration for consistent auditory presentation.

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Main Results:

  • A significant left-ear advantage was observed for correct emotional tone identification.
  • Performance was poorest for identifying the 'sad' emotional tone.
  • An interaction between ear and prosody revealed greater performance deficits for the 'sad' tone in the right ear compared to the left.

Conclusions:

  • Findings support the right-hemisphere dominance for processing affective prosody.
  • The left ear's superior performance in identifying emotional tones aligns with theories of hemispheric specialization.
  • Emotional valence, specifically sadness, presents unique challenges for auditory processing and hemispheric interaction.