The sample mean for a recent introductory psychology test was 78, and the sample variance was 9 . If a student's z-score = –2.0, what was this student's raw test score?

Carolyn Rovee-Collier and her colleagues conducted research to see whether infants demonstrate the spacing effect. The results of this research showed that

a. infants and adults responded similarly; both remembered better when their practice was distributed over time. b. infants and adults responded similarly; both remembered better when they learned the material in one concentrated session. c. infants remembered better when practice was distributed; adults remembered better when they learned the material in one concentrated session. d. infants remembered better when they learned the material in one concentrated session; adults remembered better when practice was distributed.

The Robbers Cave experiment showed that ________

a. playing athletic games, such as football and baseball, reduces us vs. them hostility. b. watching movies together, and similar quiet interactions, reduces us vs. them hostility. c. engaging in mutually exciting activities, such as tug or war, reduces us vs. them hostility. d. interdependence in reaching mutual goals reduces us vs. them hostility.