Sex Roles, Vol. 35, Nos. 11/12, 1996 Emotional Expressions of Female and Male Infants in a Social and a Nonsocial Context 1 Louise Cossette, 2 Andr~e Pomerleau, G~rard Maicuit, and Janusz Kaczorowski Universit~ du Qudbec gt Montreal While observational studies of the emotional expressions of women and men have revealed several consistent patterns of gender differences, data pertaining to the emotional expressions of male and female infants are largely inconsistent. Attempting to trace the course of early emotional development in female and male infants, we undertook to compare the emotional expressions of boys and girls at 21/2 and 5 months of age in a vanety of situations. Alt infants who participated in the study were from French-speaking Caucasian families of low and middle class. At each age level, infants were observed in a social and nonsocial situation. The social situation began with a mother-infant interaction, followed by a period during which the mother remained silent and still-faced. In the nonsocial situation, a mobile was presented and then removed. Infants' facial expressions were coded using the AFFEX system. Direction of gaze was also coded. Overall, boys' and girls' reactions were quite similar. At both ages, male and female infants spent more time looking at the toy than at their mother and showed more expressions of interest toward the toy. They also smiled more while interacting with their mother and displayed more negative expressions when facing their still-faced mother. One gender difference was found: At 21/2 months, girls smiled more than boys while interacting with their mother. Several explanations are proposed to account for these findings. 1This research was supported by fellowships from the Social Sciences and Humanities Research Council of Canada to the first author and by grants from the Natural Sciences and Engineering Research Council of Canada, and FCAR to A. Pomerlean and G. Maleuit. We thank Mathilde Brault, Nathalie Cormier, Martine Gaudreau, Pascale Gingras, Myl~ne Leblanc, and Diane Venne for their.assistance in the collection of data and in the coding. 2To whom correspondence and reprint requests should be sent at D6partement de psychologie, Universit6 du Qudbec ~t Montr6al, C. P. 8888, Succursale Centre-ville, Montr6al, QC, Canada H3C 3P8. 693 0360-0025/96/1200-0693509.50/0 © 1996PlenumPublishing Corporation