The result concerns small short-term sets, not long-term retrieval

What it is

Evidence for memory-scanning law comes from small, discrete items just presented and still held in short-term memory. It does not imply that retrieving facts, names, or skills from long-term knowledge slows linearly with the total amount remembered. Long-term retrieval often uses cue-driven association, pattern recognition, and direct retrieval.

Why it happens

Short-term items form a relatively active, comparable task set. Long-term memory is not one fully activated list waiting for serial inspection; retrieval depends on cue diagnosticity, semantic organisation, familiarity, and interference. The processes therefore do not share one slope model.

Studying it

Use brief small-set presentation and short delay for a scanning paradigm. To study long-term retrieval, manipulate cues, learning history, semantic relation, and retention interval, then measure recall, recognition, and error type. Do not fit these different retention systems to one reaction-time–set-size line.

Where it stops holding

Short- and long-term memory are not absolute compartments: practice changes representation and complex material can be chunked. Familiar sequences can recruit long-term knowledge in a short-term task, while working-memory load affects long-term retrieval. State retention conditions and available cues rather than classifying by material count alone.

Related

• Same group: B1.06.1 Judging membership in a memory set takes longer linearly as the set grows · B1.06.2 Scanning is exhaustive rather than self-terminating · B1.06.3 The finding concerns memory judgment, not visual search · B1.06.4 Reaction time rises by tens of milliseconds per remembered item · B1.06.5 Similar slopes for yes and no responses indicate exhaustive scanning · B1.06.7 Using the law to set an interface-option limit is a cross-paradigm error
• Nearby: B1.07 Power law of practice · B1.04 Hick-Hyman law
• Search terms: short-term memory scanning · long-term memory retrieval · retrieval cue