What is nondeclarative memory?

• A. Explicit memory
• B. Implicit memory
• C. Episodic memory
• D. Semantic memory

Answer: (B)

Nondeclarative memory is the part of memory you can’t consciously recall, yet it shapes how you act. It’s also known as implicit memory. You demonstrate it through performance and skills rather than a verbal report of facts. Think of riding a bike, tying shoelaces, typing fluently after practice, or a conditioned startle to a cue—these aren’t things you recall step by step, but you show you’ve learned them by doing them.

This contrasts with explicit (declarative) memory, where you consciously remember information such as personal events (episodic) or general knowledge (semantic). Brain systems differ as well: nondeclarative/implicit memory relies more on structures like the basal ganglia and cerebellum for skills and procedural learning, while explicit memory depends more on the medial temporal lobe and hippocampus for conscious recall. In cases of memory impairment, people can lose explicit memories but still show learning and performance that reflect nondeclarative memory, illustrating the separation between these systems.

So the best answer is implicit memory.