Final answer:
Sigmund Freud would most likely use free association to discover the hidden conflicts causing his patients' symptoms, which involves a patient speaking freely to uncover unconscious thoughts and memories. This and projective testing like the Rorschach Inkblot Test are rooted in psychoanalytic theory.
Step-by-step explanation:
The technique Sigmund Freud was most likely to use in an attempt to discover the hidden conflicts underlying his patients' symptoms is free association. Freud's psychoanalytic theory posited that unconscious conflicts, often stemming from childhood, play a significant role in mental disorders. He used free association to uncover repressed memories and underlying issues by encouraging patients to vocalize their thoughts without censorship. This method helps reveal the unconscious content of the mind, which Freud believed was crucial for understanding and treating psychological distress.
In reference to the provided information, Freud developed his theory of human personality through in-depth interviews, known as a case study approach. Projective testing is another method associated with Freud's theories, particularly the use of Rorschach Inkblot Test and Thematic Apperception Test (TAT), though free association was more directly employed by Freud in psychoanalytic sessions.