__________ believed that human emotional expressions were part of a long evolutionary history.

Without __________ babies would not have depth perception.

An expression of happiness in response to interacting with others is called __________.

The five characteristics that are evaluated in the Apgar scale are __________.

The emotion that an infant would most likely display earliest in development is __________.

What did Piaget call the cognitive structures for processing, organizing, and interpreting information?

Children born with chromosomal problems are almost always born to parents with __________.

The most influential theory of cognitive development from infancy through adolescence is the one developed by __________.

What is the term that developmentalists use to describe the oo-ing, ah-ing, and gurgling sounds that infants produce around 2 months of age?

From infancy onward, __________ comes easier to us than __________.