According to an evolutionary scientist, what characteristic of the penis would serve an important function related to sperm competition (when the sperm of two or more men is present in the female reproductive tract)?

What does research indicate is the best treatment for phobias?

A. Exposure therapy B. Psychoanalysis C. Cognitive restructuring D. Family therapy

Dollard and Miller's learning theory explains neurotic behavior in terms of

A) self-reinforcement (masturbation). B) approach-avoidance conflicts. C) the example of "big bertha." D) tertiary drives and classical conditioning. E) primary drives being repressed.