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10. in 2009, roughly of people age 12 or older who did not drink alcohol were current users of illegal drugs. a. 4% b. 10% c. 13% d. 20%

It's important to recognize children when they follow the rules because not doing so can a. them to develop their self-esteem. b. improve their self-image. c. to develop self-regulation. d. cause them to act out to receive adult attention.

The double-blind procedure is most for a.random assignment b.the placebo effect c.operational definitions replication d. standard deviations