In additive colour mixing, a mixture of red and green lights appears to the normal observer:

Two patients are in the local mental hospital: one is diagnosed with delusional disorder and the other with schizophrenia. What is the major difference between these two patients?

a. The patient with delusional disorder shows evidence of a mood disorder. b. The patient with schizophrenia has negative, but not positive symptoms. c. The patient with schizophrenia has no history of schizophrenia in the family. d. The behavior of the patient with delusional disorder is not bizarre, and other than in areas related to his delusions, he experiences no social or occupational impairment.

The Premarital Relationship Enhancement Program (PREP) involves couples meeting in small groups to discuss marital relations and to learn communication skills. What has research revealed concerning the effectiveness of this program?

a. Couples that go through this program report higher marital satisfaction after three years than do couples in the control group. b. Couples that go through this program report less marital satisfaction three years later than do couples in the control group. c. Couples that go through this program report more satisfaction, but they also report more conflict than do the couples in the control group. d. Couples that were randomly assigned to this program reported less marital satisfaction after three years than did couples who made the decision on their own to participate.