__________ describes the brain’s high responsiveness to environmental circumstances.

Compared to neonates, toddlers sleep __________ fewer hours per day.

__________ is the process in which neuronal connections that are used become stronger and faster and the neuronal connections that are not used wither away.

By the end of his or her first year, the typical infant __________.

The _________ lobes are responsible for advanced processes such as planning for the future, decision-making, and production of spoken language.

__________ 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 __________.