- Change
- Child psychology
- clairvoyance
- Claustrophobia
- Client-centered therapy
- Clinical psychiatry
- Clinical psychology
- Codependency
- Cognitive dissonance
- cognitive psychology
- Color vision
- Communication Skills and Disorders
- Community Health
- Community mental health
- Compulsive behavior
- Concept
- Conditioned responses
- Conditioning
- Conflict management
- Conformity