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Talker-specificity and token-specificity in recognition memory.

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Listeners better recognize repeated words from the same speaker, even with novel acoustic variations. This study suggests speech perception research should account for talker variability and episodic encoding for a clearer understanding of voice recognition.

Keywords:
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Area of Science:

  • Cognitive Psychology
  • Speech Perception
  • Auditory Neuroscience

Background:

  • Recognition memory experiments often use identical speech tokens, creating a confound between talker and stimulus identity.
  • Talker-specificity effects, where listeners recognize words better from a familiar talker, are foundational in speech perception research.
  • The extent to which listeners encode high-level acoustic characteristics of a talker's voice remains an open question.

Purpose of the Study:

  • To investigate the distinct roles of token repetition and talker repetition in continuous recognition memory.
  • To determine if talker-specificity effects persist with novel, non-identical speech tokens.
  • To explore how variations in talker characteristics influence episodic encoding and memory.

Main Methods:

  • Two continuous recognition memory experiments were conducted.
  • Experiment 1 used a single talker with either identical or novel repeated tokens.
  • Experiment 2 involved two demographically matched talkers, presenting same-voice repetitions as either identical or novel tokens.

Main Results:

  • Classic talker-specificity effects were observed for both identical and novel tokens.
  • Recognition memory for identical tokens was sometimes stronger than for novel tokens.
  • Recognition memory varied across talkers, indicating differential episodic encoding.

Conclusions:

  • Novel speech tokens should be the default in recognition memory studies to avoid confounds.
  • Listener memory is sensitive to talker-specific acoustic information beyond exact stimulus repetition.
  • Accounting for talker variation is crucial for advancing the understanding of speech encoding and memory processes.