Final answer:
Psychologists have three ethical concerns: informed consent, confidentiality, and deception. Deception is a method used by researchers to prevent participants' knowledge from affecting study results, and participants receive a debriefing after the study to provide complete information.
Step-by-step explanation:
For psychologists, ethical concerns can be divided into three areas: informed consent, confidentiality, and deception. Deception is not one of the ethical concerns for psychologists because it is actually a method that researchers might use in their studies to prevent participants' knowledge of the exact research question from affecting the results. However, when deception is used, participants must receive a full debriefing after the study to provide them with complete and honest information about the purpose of the experiment and how the data collected will be used.