The therapist is using "controlled observation".
Controlled observation is a sort of observational study where the conditions are thought up by the scientist. This sort of perception might be completed in a research center compose circumstance and in light of the fact that factors are controlled is said to be high in charge. The Dement and Kleitman contemplate is a case of controlled perception. The shortcoming of the technique is that it will be low in environmental legitimacy contrasted with naturalistic perception. On the off chance that members know they are being contemplated they carry on in an unexpected way.