- comprehension strategy
- compulsion
- compulsive personality disorder
- computer analogy
- computer model
- computer simulation
- computer-aided instruction, CAI
- computerized adaptive test
- concentrative meditation
- concept
- concept acquisition
- concept development
- concept formation
- concept formation in primate
- concept identification
- concept learning
- concept storage
- concept structure
- concept system
- concrete operation
- concrete operational stage
- concrete thinking
- concurrent validity
- conditioned immunity
- conditioned reflex, CR
- conduction aphasia
- cone cell
- confabulation
- confession obstacle
- confidence coefficient
- confidence interval
- confidence limit
- conflict
- conformity
- congenital attribute
- congruent validity
- congruity theory
- conjugate eye movement
- conjunctive concept
- connection theory of learning
- connectional-cognitive theory of learning
- connectionism psychology
- consanguinity study
- conscious attention
- consciousness
- conservation
- conservative focusing
- consolidation of knowledge
- constant error
- construct validity