Unconditional positive regard Complete love and acceptance of an individual by another person, such as a parent for a child, with no conditions attached.
Unconditioned response (UCR) In classical conditioning, the response elicited by an unconditioned stimulus without prior training or learning.
Unconditioned stimulus (UCS) In classical conditioning, the stimulus that elicits an unconditioned response.
Unconscious The domain of the psyche that stores repressed urges and primitive impulses.
Unconscious inference Helmholtz's term for perception that occurs outside of conscious awareness.