Conversation so far:
What began the start of Alfred Adler's career?
Alfred Adler began his medical career as an ophthalmologist, but he soon switched to general practice, and established his office in a less affluent part of Vienna.
What was the reason Alfred Adler switched his career focus?

Question: When did he decide to study Psychology or become a Psychologist?
Self-contained rewrite: When did Alfred Adler decide to study Psychology or become a Psychologist?