Think of a Research Experiment Designed to Test Which Diet

Multiple Choice

Think of a research experiment designed to test which diet is best at helping people lose weight-Atkins, Jenny Craig, or Weight Watchers.The results could show that the average weight lost on Atkins was 6 pounds per week and on Jenny Craig and Weight Watchers was 2 pounds per week.It is important to ask yourself if participants are dropping out of a study in a manner that might influence the results to determine if __________ is a threat to internal validity.

A) testing
B) diffusion of treatment
C) instrumentation
D) attrition