Counting backwards by threes from one hundred measures working memory and attention in psychological tests

the verdict

COMMON KNOWLEDGE

Legacy classification; evidence review pending

Recorded sources

no sources on either side

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Is it true that counting backwards by threes from one hundred measures working memory and attention in psychological tests?

Counting backwards by threes (serial subtractions) is a standard cognitive task used to assess working memory, attention, and mental processing speed in clinical and psychological testing; no formal citation is needed for this basic definition.

Verdict: COMMON KNOWLEDGE · 0 sources for, 0 against · Last checked 5 Aug 2026

The analysis

The claim describes a standard, widely understood cognitive test procedure (serial sevens or serial threes subtraction) used in mental status examinations and psychological tests to evaluate attention and working memory. Because this is a matter of common procedural definition in clinical and psychological practice rather than a contestable empirical discovery, it falls under COMMON_KNOWLEDGE.

What does the evidence say?

Receipt History

first checked05 Aug 2026

judged → COMMON KNOWLEDGE · 9505 Aug 2026

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