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Fig. 3 | Biology of Sex Differences

Fig. 3

From: Characterization of juvenile play in rats: importance of sex of self and sex of partner

Fig. 3

Pinning frequency is modulated by play partner, sex, and age. a Males exhibited a higher pinning frequency relative to females in both same- and mixed-sex pairs (Student’s t tests with Welch’s correction: **p < 0.01, ***p < 0.001). Males decreased their pinning frequency when paired with a female relative to when paired with another male, while frequency of female pinning was not dependent on the sex of her play partner (paired t tests: ***p < 0.001, ns = not significant). b Separation of pinning behavior into individual days revealed a significant main effect of age (two-way repeated measures ANOVA) with Tukey post hoc analysis revealing differences in males paired with females on PN27 and PN30 relative to PN36 and on PN30 relative to PN34 (*p < 0.05). c Comparison of play on PN32 (familiar partner) and PN33 (novel partner) did not reveal an interaction between pair type and partner familiarity (two-way repeated measures ANOVA: ns = not significant)

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