The combination-of-chemicals task, in which children discover how to mix four colorless liquids to make yellow, requires which type of thinking skills for its solution?

If a person displays psychotic symptoms for at least one month but less than six months, the DSM-5 diagnosis would be

a. schizophrenia. b. grossly disorganized disorder. c. autism spectrum disorder. d. schizophreniform disorder.

In a study of a group of healthy college students who were getting 7 to 8 hours of sleep a night and showed no apparent signs of sleep deprivation, ______ percent fell asleep immediately when they were put in a dark room, a symptom of chronic sleep loss

a. 20 c. 60 b. 40 d. 80