Among children below 80 IQ in the Providence grammar schools, only one of 220 made a mark better than C¶

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¶

q2 i? In the Providence grammar schools the most usual mark of children with IQs between 70 and 79 was D (conditioned), with more failing (E) than passing (C), and only one child below IQ 80 made a better mark than C. → Cobb 1922

Evidence¶

Cobb 1922¶

Cobb, Margaret V. (1922). The Limits Set to Educational Achievement by Limited Intelligence. The Journal of Educational Psychology, Vol. XIII, No. 8. https://eric.ed.gov/?q=The+Limits+Set+to+Educational+Achievement+by+Limited+Intelligence

q2 · i? · associational · r1

Section I reports school-mark data from the annual report of the Providence Public Schools for 1917-1918. The quoted sentence states the count: "Only one child, among the 220 included in the table" below IQ 80 exceeded a C mark. The article notes the accompanying correlation table over-represents backward children.

"Only one child, among the 220 included in the table whose intelligence quotients were below 80, made a better mark than C."

Discussion¶

Learner Variables¶

• General Cognitive Ability — predictor: learners who differ on it differ in outcomes

Related Claims¶

• IQ and working memory are reliable predictors of academic achievement at the beginning of school when domain knowledge is not controlled — a broader claim this one bears on