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Related Experiment Video

Updated: May 28, 2026

Assessing Pupil-linked Changes in Locus Coeruleus-mediated Arousal Elicited by Trigeminal Stimulation
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Assessing Pupil-linked Changes in Locus Coeruleus-mediated Arousal Elicited by Trigeminal Stimulation

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Memory strength and specificity revealed by pupillometry.

Megan H Papesh1, Stephen D Goldinger, Michael C Hout

  • 1Department of Psychology, Arizona State University, Tempe, AZ 85287, USA. megan.papesh@asu.edu

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
|October 25, 2011
PubMed
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Recognition memory is better when the voice matches during encoding and retrieval. Pupillometry revealed that stronger memories and voice matching increased cognitive effort and pupil dilation.

Area of Science:

  • Cognitive Psychology
  • Neuroscience

Background:

  • Recognition memory is influenced by various sensory cues.
  • Prior research indicates voice familiarity can impact memory recall.

Purpose of the Study:

  • To investigate voice-specificity effects in recognition memory.
  • To explore the cognitive demand associated with voice matching during memory retrieval using pupillometry.

Main Methods:

  • Behavioral experiments measuring recognition accuracy and confidence ratings.
  • Pupillometry to assess cognitive effort during encoding and retrieval.
  • Participants classified spoken words/nonwords as old/new across different voice conditions.

Main Results:

  • Recognition accuracy was higher for items presented in the original voice.

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  • Pupil dilation indicated greater cognitive effort for successfully recognized items.
  • Pupil responses correlated with memory strength and encoding-retrieval voice match.

    • Conclusions:

    • Voice cues play a significant role in episodic recognition memory.
    • Pupillometry effectively measures cognitive engagement in memory tasks.
    • Findings align with episodic memory models and the SCAPE framework.