Gender differences in latency and duration of emotional expression in 7- through 13-month-old infants

Marta Losonczy-Marshall1
1Salisbury University, United States
Cite this article:  Losonczy-Marshall, M. (2008). Gender differences in latency and duration of emotional expression in 7- through 13-month-old infants. Social Behavior and Personality: An international journal, 36(2), 267-274.

Volume 36 Issue 2 | e1695 | Published: March 2008 | DOI: https://doi.org/10.2224/sbp.2008.36.2.267

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A total of 82 infants aged 7 through 13 months were each presented with a randomized order of stimuli in a large descriptive study. All infants passed developmental screening tests (5-minute Apgar and Denver II; Apgar, 1953; Frankenburg & Dodds, 1990). Emotional expressions in response to the stimuli were recorded by video. Male and female infants’ responses to 5 social stimuli (82 x 5 = 410 observations) were analyzed. Latency was the time between the presentation of a stimulus and the beginning of a facial expression in response to that stimulus. Duration was the time between the beginning of a facial expression and the end of that facial expression. Both latency and duration were measured in terms of time (seconds). Gender differences were found in latency: t = 2.41, p < .05, but not duration of emotional expression. Females had shorter latency to emotional expression and longer duration of emotional expression than males.

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