I have 30 scores from 15 subjects in two-group within-subject research. The df for correlated t is 14.

In order to eliminate the third-variable problem in correlational research, which of the following techniques can a researcher employ?

a. Case studies b. Placebo techniques c. Random assignment d. Matched samples

Which of the following is a socializing agent for sexual behavior?

a. parents b. school c. the media d. all of the above