Which researcher argued that as much as 80% of intelligence is a result of heredity?

Genetic factors in the cause of alcohol abuse could be somewhat indirect. It has been suggested, for example, that genes that influence __________________ may cause a person to be more likely to risk alcohol dependence

a. intelligence b. depression c. ADHD d. sensation seeking

If Betsy is afraid of monsters under her bed at bedtime, what is most likely the best way her parents can help her overcome her fear?

a. They should look under the bed with Betsy watching and have her look with them. b. They should assure her that nothing will happen to her and tell her to "be brave." c. They should ignore her fear and refuse to talk about monsters with her. d. They should mildly punish her when she expresses the fear.