Rats eat __________ when fed __________.

Morphine is an excellent pain killer/analgesic

Indicate whether the statement is true or false

Which of the following is a type of correlated-groups designs?

a. within-subjects designs b. matched-subjects designs c. between-subjects designs d. both within-subjects designs and matched-subjects designs

Young children are not known for their interest in cleaning their rooms. Which child is likely to do the best job?

a. ?Joanne, whose parents throw away any toys she leaves on the floor b. ?Austin, who gets paid five dollars a week to keep his room clean c. ?Jason, who from a very young age seemed to take pride in keeping his room neat and clean d. ?Demetra, whose parents withhold her allowance if her room is not kept clean

Which of the following statements is true regarding new discoveries about genotypes and phenotypes?

Genes affect only a handful of behaviors. Most environmental influences on children raised in the same home are not shared. People tend to choose friends and associates based solely on social interactions. In nonidentical twins, genes elicit responses that are not explained in our current understanding.