risk: potential for physical, psychological, social, or financial harm. A research protocol deemed to put its subjects at no risk may be eligible for Level I approval. (Anonymous surveys often constitute no-risk research.) By contrast, minimal risk means that some potential for harm exists, but that the probability and magnitude of harm are not greater in and of themselves than those ordinarily encountered in daily life or during the performance of routine physical or psychological examinations or tests. Research that involves minimal risk often is eligible for Level II approval.