Conversation so far:
What began the start of Adler's career?
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 across from the Prater.
What was the reason he switched his career focus?
His clients included circus people, and it has been suggested that the unusual strengths and weaknesses of the performers led to his insights into "organ inferiorities" and "compensation".

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?