Which of the following is a good example of behavior modification for changing snacking behavior? a) i won't purchase any extra food. b) i won't eat dessert so i can have snacks throughout the day. c) when i want a snack, i'll only take half of what i really wanted. d) when i want a snack, i'll take a 20- minute walk, then reevaluate whether or not i still want it.

Aresearcher is interested in the effect of exercise on stamina in elderly patients. the patients are randomly assigned to be in a high-exercise or low-exercise training program. at the end of the program, their stamina is measured by seeing how long they can walk comfortably on a treadmill. identify the independent variable. identify the dependent variable and explain how it was measure.