Acriterion for waiving informed consent is that, when appropriate, subjects are provided additional pertinent information after the study. in which of the following studies would it not be appropriate to provide subjects with information about missing elements of consent?

A study in which subjects were assigned to study activities based on an undesirable or unflattering physical characteristic as assessed by members of the research team.

Explanation:

If subjects were to learn that the research team assigned them to study conditions based on undesirable or unflattering physical characteristics, the knowledge that their appearance was judged negatively by the research team could be very distressing and, therefore, it would not be appropriate to inform subjects after the study about how they were assigned. Informing subjects about the actual research procedures in the other studies would be unlikely to cause them harm.