A researcher decides to study cognitive changes in children by simultaneously studying groups of 3-year-olds, 6-year-olds, 9-year-olds, and 12-year-olds. This researcher is conducting a study.

Paleoanthropologists believe that the predominant diet of our earliest omnivorous ancestors consisted mostly of

The civilian conservation corps (ccc), an agency established during the great depression as part of the new deal, created jobs for people who were unemployed. what kind of work did people do as part of the ccc? a. built libraries and hospitals b. maintained state and national forests c. photographed migrants and the homeless d. constructed roads and bridges

Whether or not a given study has the possibility of causing harm to participants: