Event-Related Potential Measures of 24-Hour Retention in 5-Month-Old Infants

Two experiments using event-related potentials (ERPs)investigated 24-hr recognition memory in infants. In each, ERPs were recorded to 100 identical stimuli in 5-month-olds. After 24 hr, 50 of these familiar stimuli and 50 novel stimuli were presented. In Experiment 1, the 2 stimuli were a tone and a...

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Bibliographic Details
Published in:Developmental psychology 1995-11, Vol.31 (6), p.946-957
Main Authors: Thomas, David G, Lykins, M. Sue
Format: Article
Language:English
Subjects:
Auditory Evoked Potentials
Auditory Stimuli
Babies
Biological and medical sciences
Child development
Developmental psychology
Event related brain potentials
Fundamental and applied biological sciences. Psychology
Human
Infants
Measures
Memory
Newborn. Infant
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Recognition (Learning)
Recognition memory
Retention (Psychology)
Short Term Memory
Stimulus Novelty
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Summary:Two experiments using event-related potentials (ERPs)investigated 24-hr recognition memory in infants. In each, ERPs were recorded to 100 identical stimuli in 5-month-olds. After 24 hr, 50 of these familiar stimuli and 50 novel stimuli were presented. In Experiment 1, the 2 stimuli were a tone and a click. The amplitude of a negative peak (N2; approximate latency = 350 ms) of the auditory ERP was larger on Day 2 for the familiar stimuli compared with ERPs for both Day 1-familiar stimuli and Day 2-novel stimuli. Trial-to-trial latency variability of N2 decreased from Day 1 to Day 2 for the familiar stimuli. In Experiment 2, 2 tones differing only in frequency (pitch) were used. The results replicated those of Experiment 1. In addition, an earlier positive peak (P2; approximate latency = 200 ms) showed larger amplitudes and smaller latency variability to the familiar stimulus on Day 2.
ISSN:0012-1649
1939-0599
DOI:10.1037/0012-1649.31.6.946