Complex sentence: Several of Freud's colleagues and students went on to establish their own disciplines--including Alfred Adler's individual psychology and Carl Jung's analytical psychology--while Freud retained the term "psychoanalysis" for his own school of thought.
Split into simpler sentences: Several of Freud's colleagues and students, such as Alfred Adler and Carl Jung, went on to develop their own ideas. Jung established the discipline of Analytical Psychology, while Freud insisted on retaining the term "psychoanalysis" for his own school of thought.