Final answer:
In psychological research, the honor system is supported by informed consent, confidentiality, and anonymity. The correct option is 4.
Step-by-step explanation:
The honor system in psychological research is supported by several ethical practices. These include obtaining informed consent from research participants, ensuring confidentiality of their personal information, and providing anonymity to protect their identities.
Informed consent involves informing participants about the purpose of the research, potential risks and benefits, and their rights to withdraw at any time.
Confidentiality guarantees that the data collected will be kept private, while anonymity ensures that participants' identities are not revealed.