The design of a scientific study is __________ in nature

If all we know is that watching a lot of televised violence is correlated positively

with the tendency to behave aggressively, then we could conclude that (a) people who watch a lot of violent TV are, on the average, more likely to be more aggressive than people who do not watch a lot of violent TV (b) watching televised violence is a causal factor in aggression (c) the same personality trait that causes aggressive behavior makes people want to watch violence (d) none of the above

Child-invented games usually rely on

A) complex physical skills. B) a sizable element of luck. C) social problem-solving skills. D) an element of physical risk-taking.