IQ scores tend to run low in communities where adults are engaged mostly in unskilled or semi-skilled labor, and apparent age- or grade-level anomalies usually have an explainable cause¶
Claim · All claims
Evidence · 1 study · associationalr1·q1
Currency · newest study 1922 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
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? The authors report that in the foreign section of a city where adults work mostly in unskilled or semi-skilled labor, IQs on both group and individual examinations are likely to run low. → Walter F. Dearborn and Edward A. Lincoln 1922
Evidence¶
Walter F. Dearborn and Edward A. Lincoln 1922¶
Walter F. Dearborn and Edward A. Lincoln. (1922). How the Dearborn Intelligence Examination Standards Were Obtained. The Journal of Educational Psychology. https://doi.org/10.1037/h0075378
q1 · i? · associational · r1
The authors' observational report from their standardization experience, offered to explain that skewed IQ distributions in classes or school systems usually have an apparent reason; no effect size or test statistic is printed.
"in the foreign section of a city where the adults are engaged mostly in unskilled or semi-skilled labor the intelligence quotients on both group and individual examinations are likely to run low."
Discussion¶
Related Claims¶
- Pandemic achievement declines were uneven across racial/ethnic groups, with the largest declines still apparent for Hispanic, Black, and AIAN students in spring 2022 — related
- IQ and working memory are reliable predictors of academic achievement at the beginning of school when domain knowledge is not controlled — related
- Half-year standards were set so the median child of each age had an IQ within 0.90 to 1.10 in every community, and discrepancies were small — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
iq-skew-linked-to-community-labor-context |
title |
IQ scores tend to run low in communities where adults are engaged mostly in unskilled or semi-skilled labor, and apparent age- or grade-level anomalies usually have an explainable cause |
description |
IQ scores tend to run low in communities where adults are engaged mostly in unskilled or semi-skilled labor, and apparent age- or grade-level anomalies usually have an explainable cause |
status |
review |
evidence_strength |
weak |
newest_evidence |
1922 |
generated |
by process:wiki-ingest on 2026-10-25 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — walter-f-dearborn-and-edward-a-lincoln-1922 |
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