The investigator may discontinue your participation at any time. Sensory deprivation, sleep deprivation, use of hypnosis, deception or mental stresses are examples of psychological risks.Using Deception in Research. Studies may use deception if it is necessary to answer the research question. The purpose of this document is to assist researchers in addressing issues related to using deception in research with human subjects. When deceptive methodologies are used, participants are given incomplete or misleading information about what to expect during the study activities. Deception broadly means the use of deliberately misleading communication with participants about research purposes or activities. The use of deception and incomplete disclosure are valuable research techniques used to answer scientific inquiries in human subjects research. Mossad wanted to use the name "Gold Apollo" on its pager. Upon first inspection, the crime scene yielded few clues—a fingerprint in the bathroom, a length of rope used to bind her hands, and little else.