In a _____ distribution, the frequency of most scores is approximately equal

A discriminative stimulus is a stimulus that _____

A) provides the organism with a cue that making any of several responses will lead to reinforcement B) leads a person to discriminate against one group of people based on ethnicity or race C) cues the person into which schedule of reinforcement is being used in operant conditioning D) signals the presence of reinforcement

__________ are persistent, irrational fears of specific objects, activities, or situations

a. Phobias b. Panic attacks c. Anxiety disorders d. Compulsions