- Infant Observation (Direct)
- Infant Observation (Therapeutic)
- Infantile Amnesia
- Infantile Neurosis
- Infantile Omnipotence
- Infantile Psychosis
- Infantile Schizophrenia
- Infantile Sexual Curiosity
- Infantile, The
- Inferiority, Feeling of
- Inferiority, Feeling of (Individual Psychology)
- Inhibition
- Inhibitions, Symptoms, and Anxiety
- Initial Interview(s)
- Innervation
- Insight
- Instinct
- Instincts and Their Vicissitudes
- Instinctual Impulse
- Instinctual Representative
- Institut Claparède
- Institut Max-Kassowitz
- Integration
- Intellectualization
- Intergenerational
- Internal Object
- Internal Reality/External Reality
- International Association for the History of Psychoanalysis
- International Federation of Psychoanalytic Societies (IFPS)
- International Journal of Psychoanalysis, The
