Research participants in the Milgram experiment were told it was an investigation into the effects of punishment on learning when it really concerned obedience to an authority figure. Based on today's ethical standards, what would Milgram be required to do because of this deception

the answer to the question is punishment. or more specifically, positive punishment.

positive punishment occurs when a behavior is given a negative consequence for the individual doing the behavior.

sara no longer wants to ask questions (the behavior) because she is ridiculed by mr. smith (the punishment).

reinforcement is inaccurate because reinforcement always gives positive consequences for the individual doing the behavior, be it by introducing a pleasant consequence or removing an unpleasant one.