According to Zajonc's theory of social facilitation, when others are present, performance tends to _____ for well-learned tasks, and _____ for novel tasks.

Your friend tells you that her baby has a condition that involves the deletion of about 20 or 25 genes on a chromosome. The condition is most likely to be which of the following?

a. Sickle Cell Anemia b. Down Syndrome c. Tay-sachs d. Williams Syndrome

Researchers working with young infants need to keep all of the following in mind except

a. the ethical issue of informed consent b. inference and interpretation of responses c. finding a source of participants d. infants' tendency not to change states during a laboratory task or procedure