How do researchers know that making stairs into piano keys makes people walk more stairs

Question

Quizplus · Accepted Answer

Naturalistic observation is used to study the effects of interventions like turning stairs into piano keys on people's behavior in real-world settings without manipulating the environment or the participants. Researchers observe how such interventions encourage more people to choose stairs over escalators or elevators, thereby increasing physical activity.

How Do Researchers Know That Making Stairs into Piano Keys