The hormone involved in attachment is called _____.

Colic is:

A researcher spends several days at a day-care center observing and recording the frequency of aggressive acts among preschoolers. The researcher is employing the technique of:

The maximum lifespan:

Synaptogenesis occurs during:

Which is/are formed during the embryonic stage?

During the third stage of labor and birth:

What is a benefit of cross-sectional research over longitudinal research?

Genes:

Attachment theory BEST explains why: