Answer: The right to full disclosure
Step-by-step explanation:
Right to full disclosure is the regulation in legal terms that makes organization or any person reveal every necessary and important information to other person or party before making them enter into the contract or any type of agreement.
Any major details that should be known to other person cannot be hidden before making people enter the contract otherwise it is falsely making people engage in contract.
According to the question,right to full disclosure right is getting violated as participant do not share actual truth i.e.- cancer diagnosis coping experiment rather study on health belief is informed.