Carl Jung and analytical psychology
What did Jung observe, what did he infer, and what have later studies actually measured? The original texts and the outcome studies address different questions.
Original texts and historical questions
Word-association experiments
Jung presented stimulus words and asked participants to respond with the first word that came to mind. He recorded how long each response took and whether the participant could recall the same answer later. He interpreted some delays and failures of recall in relation to emotionally significant themes.
Interpretation Jung based his interpretation on clinical observations of the time. Any diagnostic use of response delays would require separate validation.
Psychological types and introversion–extraversion
In Psychological Types (1921), Jung described introversion and extraversion as two general attitudes. He described types according to which function predominates in how a person perceives or judges experience: thinking, feeling, sensation or intuition.
Interpretation Relating this historical model to scores on the modern MBTI or sensory processing sensitivity (SPS) scales requires separate measurement research.
Dementia praecox in psychiatric history
In his 1907 monograph, Jung examined a condition then classified as dementia praecox. He studied a patient's speech and word associations in a case analysis and interpreted how delusional expressions might relate to personal experiences and emotionally significant themes.
Interpretation Dementia praecox was a historical diagnostic category. Applying this case to modern schizophrenia diagnosis or mechanisms would require current diagnostic criteria and independent evidence.
Psychotherapy outcome research
An early review of Jungian psychotherapy outcomes
Roesler reviewed research on Jungian psychotherapy in 2013. Studies including prospective naturalistic and retrospective designs reported lower symptom burden and improvements in measures of well-being and interpersonal functioning. The studies covered by the review included no randomized controlled trials.
Interpretation Samples and assessment methods varied across studies. The review alone cannot establish which changes were attributable to treatment or how it compares with other therapies.
Before-and-after observations at a German training institute
The study compared pre- and post-treatment responses from 104 people who received supervised Jungian psychotherapy at the C. G. Jung Institute in Stuttgart. Depression, anxiety and obsessive-compulsive symptom scores fell, while the study found no statistically significant change in eating-disorder symptom scores. The 2025 and 2026 reports are grouped here because their authors, sample size, measures and main findings match.
Interpretation The study had no comparison group or long-term follow-up and analyzed only people who provided responses at both assessments. Whether therapy accounts for the observed changes and how long they persisted remain open questions.
Outcomes of two psychotherapies in routine care
The researchers analyzed data from 428 people who received psychodynamic or analytical psychotherapy in German routine care. They reassessed diagnoses at the end of treatment and analyzed annual self-reports across a six-year observation period. Measures improved in both groups, and adjusted analyses showed greater improvement in the analytical psychotherapy group on primary outcomes including symptom distress and the number of diagnoses.
Interpretation Treatment was not randomly assigned, so other factors may still explain group differences after adjustment. The abstract reports results for the analytical psychotherapy group as a whole.