Final answer:
Karen Horney decided to undergo psychoanalysis due to personal neurotic issues, which led her to pursue self-realization and therapy.
Step-by-step explanation:
Karen Horney decided to undergo psychoanalysis primarily because she was experiencing personal neurotic issues. While she did earn a psychology degree later on, it was her personal struggles that initially led her to pursue psychoanalysis. Horney's decision to undergo psychoanalysis was influenced by her own desire for self-realization and her acknowledgment of the importance of therapy in improving her mental well-being.