Menarche occurs between the ages of ______ for the average American girl

Damage to the entire hippocampus produces severe ___amnesia, and severe retrograde amnesia occurs if the hippocampal___is damaged as well.

Fill in the blank(s) with the appropriate word(s).

In the strange situation paradigm, there are two primary criteria that researchers use to assign infants to an attachment category. One of these criteria is:

a. whether the infant is willing to cross the visual cliff when encouraged by the caregiver b. the infant's emotional reaction when the caregiver leaves c. whether the infant shows a fear of strangers d. a willingness to explore in the presence of the caregiver