Professor Rose Was Asked to Design an Experiment to Test

Professor Rose was asked to design an experiment to test whether obese people would lose weight on a new diet plan.Professor Rose was not a methodologist.Rose asked for your help.You immediately told Rose that the selected design would have to be sensitive to the issues of statistical regression,diffusion or imitation of treatment,compensatory rivalry,and demoralization.Rose said,"I don't understand." Explain these issues to Rose.Suggest and explain a design that would control for these problems.