“…For example, in a mother–infant interaction paradigm (i.e., face‐to‐face still‐face) at 6 months of age, males spent proportionately more time engaging with their mothers, and were more distressed when mothers stopped responding, often producing more intense negative responses and attempts to reengage their mothers in the social interaction (Weinberg et al, 1999). Furthermore, male infants’ eye gaze toward social, relative to non‐social, toys (e.g., dolls vs. cars) declines with age between 6 and 20 months, modulated by parental attitudes about gender norms (Liu, Escudero, Quattropani, & Robbins, 2020). Together, the current study and previous findings expose the developmental complexity of sex differences.…”