In a study on the effects of background music on customer spending in cafes, Dr. Ellis observes customer behavior in various cafes without informing them of the study. What research method is Dr. Ellis using?

In a study on the effects of background music on customer spendin...

1. Introduction to Psychology(0)

2. Psychology Research(0)

3. Biological Psychology(0)

4. Sensation and Perception(0)

5. Consciousness and Sleep(0)

6. Learning(0)

7. Memory(0)

8. Cognition(0)

9. Emotion and Motivation(0)

10. Developmental Psychology(0)

11. Personality(0)

12. Social Psychology(0)

13. Stress and Health(0)

14. Psychological Disorders(0)

15. Treatment(0)