Studies have revealed that eating breakfast and skipping the snack before lunch is a type of behavior modification, a technique that is employed to hasten weight loss and reduce impulsive eating.

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.

What might explain the real-world results, show in the graph to the right, for one class of twenty students? check all that apply.

When making her coffee, mrs. jenkins likes to stir in some cream and sugar to give it a pleasant flavor. the ingredients, when combined like this, form a