A researcher who deceives participants about the goals of the research needs to fully inform them of the true nature of the study later, according to what ethical principle of human experimentation?

It is a critical part of the experiment or psychological testing in which a person participates as a subject. This procedure has been conducted after the experiment or when the study has been conducted. It is a structural and semi-structured conversation between the experimenter and participants. A subject could ask any question related to the scientific study. It comes under the code of ethics. When the study completed its experimenter duty to debrief the subjects about the nature of the study. It is experimenter liability that if some misconceptions occur during debriefing, clear all points. Experimenter or a researcher could not reveal the study in its beginning, because if participants get to know everything then it will affect the study results.