In learning, classical conditioning effects are an example of

Classical conditioning effects are stored as implicit memory, expressed without conscious recall.

Eidetic memory (B) is vivid photographic recall of images, a different phenomenon.

Retroactive memory (C) relates to interference where new learning disrupts old, not conditioning.

Explicit memory (D) is conscious, declarative memory of facts and events, unlike unconscious conditioning.

Implicit memory also includes procedural skills and priming, all non-declarative.

Classical conditioning was demonstrated by Ivan Pavlov with dogs and salivation.