One difficulty of repeated-measures designs is that, due to the possibility of fatigue, practice, or carryover, the researcher may need to use

In a study comparing women with and without anorexia, differences in brain scans

a. occurred when the women were looking at images of others. b. occurred when the women were looking at self-images. c. did not occur. d. occurred in a random pattern. A predominant percentage of women misperceived images of themselves.

In males, the hormones known as ________ control sexual arousal; in females the hormone that serves a similar purpose is known as ________

a. androgens; androgen b. estrogens; estrogen c. androgens; estrogen d. estrogens; androgen