Final answer:
The term for intentional misrepresentation to deceive someone into a contract is Fraud. Deception, though ethically justifiable when immediately followed by a full debriefing, is used in research to maintain study integrity.
Step-by-step explanation:
The term for intentional misrepresentation or concealment of a material fact used to induce another party into a contract or deceive them is Fraud. In the context of research, a related concept is the use of deception, which is different from fraud as it is often employed in psychological studies to maintain the integrity of the experiment. While deception might skew participant responses to avoid bias in the study outcomes, it is ethically justified when followed by a thorough debriefing, where all aspects of the deception are revealed to the participants.