How many different personality and work preference types exist, according to the theory of John Holland?

Research on eyewitness memory suggests that younger children are prone to memory errors because they

A) are more likely than older children to disagree with a yes-or-no question. B) tend to report gist rather than verbatim information about their experiences. C) have trouble recalling highly stressful events. D) are especially poor at source-monitoring.

Researchers are 100 percent confident that differences in behaviors of identical, monozygotic twins are due to differences in their environments

Indicate whether the statement is true or false.