If the lowest half of the home children as ranked by class tests had been individually tested, all feeble-minded cases and almost all definitely backward cases would have been detected¶

Claim · All claims
Evidence · 1 study · associational r2 · q2
Currency · newest study 1917 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 1920: tool and model accuracy changes quickly

Subclaims¶

q2 i? Testing the lowest 46 of 88 children (I. Q.s below .76) would have detected 100% of the feeble-minded and feeble-minded—backward groups and 87% of the backward group on the Yerkes Scale. → Pintner 1917

Evidence¶

Pintner 1917¶

Pintner, R. (1917). The Mentality of the Dependent Child, Together with a Plan for a Mental Survey of an Institution. The Journal of Educational Psychology. https://doi.org/10.1037/h0075825

q2 · i? · associational · r2

Retrospective analysis of how much individual testing different proportions of the class-test ranking would have required; the lowest half (46 cases, I. Q.s below .76) covered all F.M. and F.M.—B. cases and 87% of the backward group.

"If the lower half of the cases as determined by the class tests had been tested all the cases of feeble-mindedness, even on the liberal basis of .75 C. M. A., would have been detected, and in addition almost all the definitely backwaid."

Discussion¶

Related Claims¶

• Selecting the lowest 23 children by class tests would have detected every feeble-minded child, while the superintendent's nomination list detected only 60% of them — related
• In the unselected county children's home population, the C. M. A. standard yielded 20.8% feeble-minded while the Three Per Cent. Hypothesis yielded 5.7%, with most children classified backward — related