Claims

The assumption that children of a given age have a median age exactly at the half year was found incorrect in the standardization sample

Claim · All claims
Evidence · 1 study · associational r1 · q2
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.

q2 i? In the Dearborn standardization data, the half-year median-age assumption did not hold for the pupils studied; in one community the median 11-year-old was only 11.33. → 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

q2 · i? · associational · r1

Observational analysis of Dearborn test distributions, tabulated by months in three towns so both median score and median age could be found. The article reports that the long-standing half-year assumption was incorrect for these pupils, citing the printed case: "In one community the median 11 year old was only 11.33."

"In one community the median 11 year old was only 11.33, and there were many smaller variations."

Discussion

Page metadata
Field Value
type claim
id median-age-half-year-assumption-incorrect
title The assumption that children of a given age have a median age exactly at the half year was found incorrect in the standardization sample
description The assumption that children of a given age have a median age exactly at the half year was found incorrect in the standardization sample
status review
evidence_strength moderate
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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