A researcher is measuring the length of time different couples were engaged before getting married and their reported levels of happiness with their marriage. In order to determine whether these two variables are related, which type of study will the researcher design?

Siblings share _____ of their genes on average.

A) 25% B) 50% C) 75% D) 100%

Six-year-old Jean hits another child and steals the child's lunch money. A psychologist who takes a psychodynamic approach would suggest that Jean ____.?

a. ?learned that hitting someone would result in a reward b. ?has an unconscious drive for aggression, causing her to act out c. ?asserted herself, an example of bettering herself as a person d. ?hit the child for food, an adaptive mechanism to survive