Mixed ecomies ate most common used
Answer: Participant observation
Explanation: observation gives the researcher the opportunity to monitor the natural behaviour of its target population.
Normally, the study population does not know that they are being observed to avoid any bias due to change in behavior.
During observation, the data is collected using a checklist.
The answer to this question is Extinction
In the field of psychology, extinction refers to The disappearance of previous behavior that already learnt when that behavior is not reinforced.
In this case, pavlov's dog behavior has been modified to response based on the sound of the bell, and won't dsiplay it unless the trigger exist
This indicates that he has High sense of personal control.