Feeble-minded intellectual development takes two forms: near-normal development to a limit followed by abrupt cessation, or constant slight retardation with increasing backwardness¶

Claim · All claims
Evidence · 1 study · theoretical r? · q1
Currency · newest study 1912 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 1917: baselines and conditions change

Subclaims¶

q1 i? Some feeble-minded children develop nearly normally up to a point and then suddenly cease to increase in mental ability, while others develop under a constant but slight retardation at each year. → E. A. Doll 1912

Evidence¶

E. A. Doll 1912¶

E. A. Doll. (1912). Inexpert Binet Examiners and Their Limitations. The Journal of Educational Psychology. https://www.jstor.org

q1 · i? · theoretical · r?

The author's interpretation of existing knowledge about feeble-minded development, hedged as what it "tends to show": one type tests normal until reaching a developmental limit and then abruptly stops progressing, the other shows constantly increasing backwardness. No data are reported.

"even the little that we already know about the intellectual development of the feeble-minded tends to show that some do develop nearly normally up to a certain point and then suddenly cease to increase in mental ability, and that others develop under a constant, but slight, retardation at each year."

Discussion¶

Related Claims¶

• Distributions of normal and feeble-minded groups overlap, with a borderzone between them, per Kohs's examination of 335 inmates — related