News Finding: By their juvenile years, monkeys became more flexible in their gaze-following and became habituated to repeated gazes over time.
Paper Finding: The youngest monkey in our sample that followed gaze was 5.5 months old, indicating the capacity to follow gaze was present during the second half of the first year of life and the tendency to do so increased through the infant period (figure 2a).
News Context: However, they tended to take more looks than human babies do to find out what the researcher was looking at, even after three or four glances revealed nothing of interest. By their juvenile years, monkeys became more flexible in their gaze-following and became habituated to repeated gazes over time. During adulthood, monkeys' responses were more varied, and they began showing human-like sex differences, with females responding to gazes more than males.
Paper Context: Infants (n ¼ 47, 25 females, 22 males) did not show habituation or sex differences in responses, but model fit was improved by including age (x 2 1 ¼ 17.89, p , 0.001). The youngest monkey in our sample that followed gaze was 5.5 months old, indicating the capacity to follow gaze was present during the second half of the first year of life and the tendency to do so increased through the infant period (figure 2a). In juveniles (n ¼ 149, 79 females, 70 males), the inclusion of only trial number improved model fit (x 2 1 ¼ 15.14, p , 0.001).