The percentage of people who report the use of any illicit drug in the past month is highest among the 16- to 17-year-old age group

Sandra is 11 years old, and reasons at Piaget's concrete operational stage of development. Which task is likely to be beyond her ability to solve?

A) sort a set of dolls by their height B) sort a set of imaginary objects by weight C) sort a set of baseball playing cards by team D) solve all of these tasks

The Nuremberg Code stresses all of the following except:

A) projects should be conducted by scientifically qualified personnel B) participants must receive payment or compensation for participation C) risks should be avoided whenever possible D) participants should consent to participate in research E) participants should be fully informed of the purpose of the research prior to participation