DrGrayson,a Health Psychologist,conducts a Study Examining Whether People Eat More

Multiple Choice

Dr.Grayson,a health psychologist,conducts a study examining whether people eat more when they are exposed to pictures of food than when they are not exposed to pictures of food.She goes to a fast-food restaurant in downtown Chicago that has pictures of menu items on its menu board and measures the amount of food ordered during the lunch rush (11:30 a.m.-1:30 p.m. ) on Tuesday.On Thursday,she does the same thing but at a fast-food restaurant that does not have pictures on their menu board (about two blocks away from the first restaurant) .She finds that the restaurant with pictures of food sells more food than the restaurant that does not have pictures.

-Because Dr.Grayson conducted her study in a field setting,which of the following is an advantage of her study?

A) It automatically generalizes to other situations (e.g. ,fancy restaurants,cafeterias) .
B) It automatically generalizes to other people.
C) It removes all threats to internal validity.
D) It has a high degree of ecological validity.