 Although some initial milestones occur before this period that support self-concept, including basic self awareness (i.e., the ability to recognize themselves in a mirror) and self-labeling of their gender, this period involves several advances in this domain.By 42 months, children are able to describe their likes and dislikes, suggesting a developing awareness of what elicits positive and negative emotions in themselves.By 5 years old, children demonstrate agreement with their mothers' ratings of their behavior on basic behavioral indicators of personality.