Manuel is 12 months old and is showing signs of autism. Manuel's mother ingested various illegal drugs fairly frequently during her pregnancy. This might be an example of the effects of which of the following?

In the coming years, QTL mapping techniques should allow us to

a) begin to map the genes of the mouse. b) no longer rely on DNA testing to identify behavior-related genes. c) trace most behaviors to single genes. d) use genetic markers as direct indicators of genotypes.

In contrast to experiments, _______________ use techniques including observation or self-reports to provide a detailed picture of specific behaviors, such as how often they occur and under what conditions

A) correlational studies B) cross-sectional methods C) descriptive methods D) psychoanalytic studies