In some instances it is necessary and appropriate for the researcher to withhold relevant information about an experiment when obtaining consent from the participant.

Question

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This is known as a deception technique, which can be ethically justified in certain research contexts to prevent the alteration of participants' behavior that could skew the results, provided that the deception does not harm the participants and they are debriefed afterwards.

In Some Instances It Is Necessary and Appropriate for the Researcher