Problem: The researcher is studying the effect of CHO intake on incidence of nausea and vomiting (N&V) in patients who are taking Ozempic. Several of the patients do not accurately report the incidence of N&V because, when asking about the incidence of N&V, the researcher says, "I hope you haven't been having nausea and vomiting". This is a problem of _______. researcher expectations treatment diffusion compensatory effect reactivity. Need Assignment Help?