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Dichotic listening: what does it measure?

L Jäncke1, H Steinmetz, J Volkmann

  • 1Department of Psychobiology and Psychocybernetics, Heinrich-Heine-University, Düsseldorf, F.R.G.

Neuropsychologia
|November 1, 1992
PubMed
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Dichotic listening tests show low reliability for predicting language dominance. Different tests yield inconsistent ear advantages, making individual predictions unreliable for both right- and left-handers.

Area of Science:

  • Neuroscience
  • Psychology
  • Audiology

Background:

  • Auditory lateralization, the brain's preference for processing sounds in one ear, is often studied using dichotic listening tests.
  • These tests aim to determine language dominance, typically lateralized to the left hemisphere in most individuals.

Purpose of the Study:

  • To evaluate the reliability and consistency of various dichotic listening tests in assessing auditory lateralization and predicting language dominance.
  • To investigate whether different dichotic listening paradigms yield comparable results for ear advantage.

Main Methods:

  • Twenty-six right-handed and 26 left-handed healthy participants completed seven distinct dichotic listening tests.
  • Tests included free recall of digits, consonant-vowel (CV) syllables, CV syllable monitoring, and Morse code recall.

Related Experiment Videos

  • Reliability was assessed using the Spearman-Brown formula, and inter-test correlations were analyzed.

    • Main Results:

    • Reliabilities varied significantly across tests, with good reliability for CV recall and monitoring, but lower reliability for digit recall.
    • Inter-test correlations were generally low, indicating poor agreement between different dichotic tests.
    • A substantial proportion of participants (38-77%) did not show a consistent ear advantage across test combinations.

    Conclusions:

    • The evaluated dichotic listening tests demonstrate insufficient consistency and reliability for accurate individual prediction of language dominance.
    • Discrepancies may stem from psychometric, procedural, or phonetic differences among the tests.
    • Current dichotic listening paradigms are not recommended for definitive language lateralization in individuals.