c. unlike alcohol, marijuana does not make the user mean
d. marijuana is a more addictive than alcohol
In an experiment subjects are given a pre-test in an effort to assess their attitudes about
a new federal sentencing law that Congress is debating. Subjects assigned to the
experimental group are given a series of lectures by experts on the impact the new law
will have on prison populations. Immediately after the last lecture, a post-test is given
to measure any attitude changes. Anticipating what the test is designed to measure
(because of the lectures) those in the experimental group are subject to the threat of:
a. diffusion
b. statistical regression
c. instrumentation
d. testing
Which statement is the most accurate?
a. harm to subjects is never a real concern
b. harm to subjects is never appropriate
c. harm to subjects may occur if the benefits outweigh the harm