What is the main cause of low birth weight in developed countries?

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.

In signal detection tasks, naysayers will have more misses than yea-sayers

Indicate whether this statement is true or false.