hope
will
purpose
evolutionary psychology
attachment
secure attachment
avoidant attachment
resistant attachment
disorganized (disoriented) attachment
internal working model
basic emotions
social smiles
stranger wariness
social referencing
parallel play
simple social play
cooperative play
enabling actions
constricting actions
prosocial behavior
altruism
empathy
social role
gender stereotypes
relational aggression
gender identity
gender-schema theory