From an ethical standpoint, researchers using data with participants should ensure that the information is ______, in that it does not link to the identity of a specific individual.

The Environmental Protection Agency is subject to less congressional and presidential oversight than the U.S. Department of Agriculture

Indicate whether the statement is true or false

Imagine a hypothetical study using a nonequivalent comparison group designed to assess the effectiveness of an anti-drug, "Just Say No," campaign. In this study students at school X receive a semester-long series of "Just Say No" lectures

Students at school Y across town do not receive the intervention. Unfortunately, during the semester a student at school Y died after an accidental drug overdose. This incident may have influenced drug use at school Y (but not school X) and consequently make it impossible to interpret our research findings. Which of the following threats to internal validity is present in this study? a. selection-instrumentation b. selection-maturation c. selection-history d. selection-testing