Answer:
Introspection.
Step-by-step explanation:
As the exercise describes, the process that asks for personal personal observations, thoughts, feelings and behaviors is called Introspection. This is an examination of one's thoughts and emotions. The explorations of one's inner life, a recollection of thoughts. This process was used by the doctor to explore the inner side of each of their pacients and determine if the causes of their anxieties and fears were, indeed, post-traumatic stress of WW I.