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.

As long as psychologists provide informed consent about the general context of research and debrief participants afterwards (providing full details), it is acceptable for them to deceive the participants about the true purpose of the experiment.