Section: AP Psychology

4) In an effort to prevent participants in an experiment from trying to confirm the researchers' predictions, psychologists sometimes:

1. obtain written promises from participants to respond honestly.
2. treat information about individual participants confidentially.
3. deceive participants about the true purpose of an experiment.
4. allow people to decide for themselves whether they want to participant in an experiment.
5. drug people so that they will not encode any memories during the experiment.