What proportion of Canadian children aged 4 to 11 were rated by their parents as too fearful or anxious?

In general, studying is more effective when:

a. desirable difficulties are present. b. the information is organized in outlines that can quickly be reviewed several times. c. the total amount of studying time is short. d. all of the studying occurs in one long session.

Compared with other criminals, most convicted rapists

a. have much lower IQs b. show greater psychiatric illness c. have a different set of personality attributes d. none of the above