Sexual differentiation occurs by the _____ week of pregnancy

Professor Cook is conducting a research study on the cognitive abilities of infants and young children. Rather than follow subjects from birth to the age of 10, he assesses small groups from various ages

Of 1-year-olds he measures five children, of 2-year-olds he measures five different children, and so forth. By the time he has completed his study, Dr. Cook has an assessment of 50 different children from 10 different age groups. Which of the following describes the research method that Dr. Cook is using? a. a cross-sectional design b. a longitudinal design c. a quasi-experimental design d. a semi-reliable design

In studies that looked at the association between violent video games and aggressiveness, the researchers found that

a. the level of violence displayed in the video game was the determining factor in whether the participants showed aggression when given the chance. b. the competitiveness, difficulty, or pacing of a game may influence aggression levels just as much, if not more, than the violent content of the game. c. the violent video games actually sensitized the players so that they reacted negatively to the violence shown and were less likely to imitate it. d. only young children were influenced to imitate the violence with adolescents and adults not being significantly affected.