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Implicit memory, also called non-declarative memory, consists of long-term memories that influence behavior without conscious awareness or recollection. Unlike explicit memories requiring deliberate recall, implicit memories operate automatically through prior experiences. Activities like playing tennis, snowboarding, and texting rely on implicit memory to execute skilled actions smoothly without thinking about each step.

Implicit memory comprises three subsystems: procedural memory, conditioning, and priming. Procedural memory stores how to perform tasks like brushing teeth or driving. Conditioning involves automatic learning of stimulus associations, such as developing food aversions. Priming activates stored information to enhance recall of new information more efficiently and quickly.

Procedural memory stores knowledge about performing actions and skilled movements without conscious thought. An experienced typist doesn't think about key locations while typing; the nonconscious skill enables fluent, accurate performance. Athletes and individuals performing routine activities like tying shoelaces rely on procedural memory to execute complex physical maneuvers automatically and efficiently.

Classical conditioning is automatic learning where an individual associates two stimuli, leading to similar responses to both without conscious awareness. For example, developing a preference for a classmate who sits nearby during enjoyable classes creates an implicit liking through subconscious association of positive feelings with that person's presence.

Priming activates existing memories to improve recall and recognition of new information. Reading cold-related words like ice, cold, and frost primes participants to fill in blank letters as snow rather than show. This nonconscious activation of related memories makes processing new information easier and faster on various cognitive tasks.

If someone becomes sick shortly after eating a particular food, they develop a dislike for it through implicit conditioning, even if the food wasn't the actual cause. The negative association between the food and illness prompts automatic avoidance behavior in the future, demonstrating how implicit memory influences behavior without conscious reasoning.

Implicit memory operates automatically in routine activities without requiring conscious effort or deliberate recall. Explicit memories demand intentional recollection of facts or events. Texting, snowboarding, and playing tennis exemplify implicit memory because performers execute these skills fluidly without consciously thinking about each movement or decision.