When four-place by four-place mental multiplication came to a standstill under extreme fatigue, ability to multiply any numbers was also lost¶
Claim · All claims
Evidence · 1 study · causalr1·q1
Currency · newest study 1914 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
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the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q1 i? When ability to multiply four-place by four-place numbers stopped from fatigue, ability to multiply any number by any other number was also lost. → W. S. Painter 1914
Evidence¶
W. S. Painter 1914¶
W. S. Painter. (1914). Efficiency in Mental Multiplication Under Extreme Fatigue. The Journal of Educational Psychology. https://psycnet.apa.org/journals/edu/
q1 · i? · causal · r1
Final-test observation: after the last four-place by four-place problem (solved in sixteen minutes and thirty seconds), the experimenter could not secure even the first partial product of a three-place by three-place problem. The conclusion reports the loss generalized to any multiplication.
"when ability mentally to multiply a four-place by a four-place number had come to a stand-still as a result of extreme mental fatigue, ability mentally to multiply any number by any other number was also lost."
Discussion¶
Related Claims¶
- Under extreme fatigue, mental multiplication efficiency ends at a definite, relatively abruptly appearing point rather than tailing off by degrees — related
- Subjective fatigue states under prolonged mental work included failure to hold and banish partial products, lethargy, and labored breathing — related
- Fifteen days of one-hour daily practice produced fairly steady four-place by four-place mental multiplication — related
- During the final fatigue test, time per problem rose gradually, then markedly, with no obvious correlation between time and accuracy — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
fatigue-total-loss-all-multiplication |
title |
When four-place by four-place mental multiplication came to a standstill under extreme fatigue, ability to multiply any numbers was also lost |
description |
When four-place by four-place mental multiplication came to a standstill under extreme fatigue, ability to multiply any numbers was also lost |
status |
review |
evidence_strength |
weak |
newest_evidence |
1914 |
generated |
by process:wiki-ingest on 2026-10-24 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — w-s-painter-1914 |
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