Levels-of-processing effect

The finding that information processed for meaning is generally remembered better than information processed only for its surface features. It challenges explanations of memory based chiefly on rehearsal duration.

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Levels of processing: A framework proposing that memory depends on how deeply information is analyzed, from surface features to meaning. The effect is the framework’s central prediction: semantic analysis usually yields stronger memory than surface analysis.
Craik and Lockhart: Fergus Craik and Robert Lockhart were psychologists who proposed the levels-of-processing framework in 1972. Their paper introduced the framework that the effect summarizes.
Incidental learning: Learning that occurs without an intention to memorize the material. Levels-of-processing studies often test memory after participants answer questions without expecting a memory test.
Distinctiveness heuristic: A strategy of using distinctive details to decide whether an event was previously experienced. Distinctiveness can improve memory without requiring that meaning is always the deepest or best encoding.
Semantic memory: Long-term memory for concepts, meanings, and general knowledge rather than specific personal events. Meaning-based encoding links the effect to the organization of conceptual knowledge.
Semantic encoding: Encoding information by processing its meaning and relationships to existing knowledge. Meaning-focused encoding is the deeper processing associated with the effect.
Maintenance rehearsal: A strategy of repeating information to keep it active in short-term memory without adding meaning. The effect challenged the assumption that repetition alone reliably produces durable memory.
Orienting task: A task that directs attention toward a particular feature or meaning of material during encoding. Researchers create shallow and deep conditions by asking different orienting questions about the same words.
Generation effect: The finding that information generated by a learner is often remembered better than information merely read. It offers a separate encoding advantage that can accompany, but is not identical to, semantic depth.
Encoding in memory: The processes that transform information into a form that can be stored and later retrieved. The effect shifted attention toward what happens during encoding, not just storage duration.