On the seven-digit rote memory test the treated class gained 10.8% over its own first record while the untreated class gained none¶
Claim · All claims
Evidence · 1 study · causalr1·q2
Currency · newest study 1913 · not yet checked against its sources · not reviewed by a person
Subclaims¶
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q2 i? The treated class improved on the seven-digit memory-span series (74.9% to 85.7%, a gain of 10.8%) while the untreated class showed no gain (71.4% both times). → Emma Kohnky 1913
Evidence¶
Emma Kohnky 1913¶
Emma Kohnky, M.A. (1913). Preliminary Study of the Effect of Dental Treatment upon the Physical and Mental Efficiency of School Children. The Journal of Educational Psychology. https://www.jstor.org/journal/jeducpsych
q2 · i? · causal · r1
Results table for the seven-digit rote memory series (Whipple's Test 38), scored in percents for correct digits and order. The treated class (Room 21) moved from 74.9% to 85.7%; the untreated class stayed at 71.4%. Descriptive percents only; no inferential statistic is printed.
"Room 21 leads at the beginning by 3.5% and by 14.3% in the second group, finishing with a gain of 10.8% over its first record as against no gain in the other class."
Discussion¶
Related Claims¶
- After one school year, the dental-treatment class led in nine of ten psychological and psycho-physical tests, having led in only five of ten before treatment — related
- Test-retest correlations of memory span are low, questioning the validity of a single memory span test — related
- The digit memory-span increases with age rather than with grade-promotion measures of intelligence, reaching a limit of six digits for most grammar and high school pupils — related
- On the substitution learning test the treated class showed a larger saving of time (101.0 vs. 91.1 seconds) between first and last sheets — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
treated-class-gain-seven-digit-rote-memory |
title |
On the seven-digit rote memory test the treated class gained 10.8% over its own first record while the untreated class gained none |
description |
On the seven-digit rote memory test the treated class gained 10.8% over its own first record while the untreated class gained none |
status |
review |
evidence_strength |
weak |
newest_evidence |
1913 |
generated |
by process:wiki-ingest on 2026-10-25 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — emma-kohnky-1913 |
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