Answer:
Psychoanalyst.
Explanation:
Sigmund Freud who is known as the "father of Psychology" gave the theory of the workings of the human mind which includes the conscious, unconscious and subconscious elements that contribute to the human experience. His theories assist the psychoanalysts in evaluating mental disorders like depression, anxiety, dementia, memory disorders, etc. Thus, a psychoanalyst would wonder and ascertain the unconscious factors that contribute to that particular disorder or change in behavior that affects our doings and relationships as we ourselves are unaware of the factors that influence our actions and habits. Psychoanalysts would help in disclosing those unconscious forces that have led people like Spencer for emotional or mental suffering.