Dr. hennessy believes that psychologists should analyze only human conduct that can be observed, not ideas, thoughts, feelings, or motives. he is most likely a

behaviorist

Explanation:

Behaviorism: In psychology, the term behaviorism is also referred to as behavioral psychology, and is defined as a learning theory which is entirely based on the idea that all behaviors of an organism including human beings and animals are gained or acquired through the process of conditioning that occurs through the various interaction with an organism's surrounding environment.

Behaviorist: The behaviorists are the person who believes and follows the behaviorism or the behavioral psychology. They believe that an organism's response to the environmental stimuli helps in shaping the actions.

In the question above, Dr Hennessy is most likely a strict behaviorist.        

where is the