A psychologist concludes his method would be effective for teaching math to all third graders on the basis of testing it on a selected group of third graders with a control group for comparison. He is making use of

Theorists have suggested that people's conceptualizations of love cluster into three dimensions—passion, intimacy, and commitment

a. true b. false

In a study comparing the United States to six foreign cultures, ______ the "Big Five" traits

a. only people in the United States showed evidence of b. only people in non-European foreign cultures showed evidence of c. only people in the United States and European cultures showed evidence of d. the results in all six cultures were identical to those in the United States regarding