Scattering varies with intelligence-age level: smallest at the lowest mental ages and possibly largest in the middle range, with age-level differences exceeding diagnostic-category differences¶

Claim · All claims
Evidence · 1 study · associational r1 · q2
Currency · newest study 1921 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? The smallest amount of scattering occurs at the lowest mental age levels, and the largest possibly in the middle range of ages. → Wallin 1921 q2 i? Differences between least- and greatest-scattering age levels reach one year (1908), a year and a third (Stanford), and almost a year and two-thirds (1911), exceeding the differences between intelligence categories. → Wallin 1921

Evidence¶

Wallin 1921¶

Wallin, J. E. W. (1921). Intelligence Irregularity as Measured by Scattering in the Binet Scale. The Journal of Educational Psychology. https://psycnet.apa.org/journal/edu

q2 · i? · associational · r1

Descriptive analysis of scattering by intelligence-age level across the three scales, with the author noting results are discrepant across scales and that upper-age data are unreliable because of scale limits. The author states these age-level differences do not entirely harmonize with Pressey's and Mathews' findings.

"it would be that the smallest amount of scattering occurs in the lowest mental age levels, and possibly that the largest amount tends to occur in the middle range of ages."

Discussion¶

Learner Variables¶

• Age and Developmental Stage — predictor: learners who differ on it differ in outcomes

Related Claims¶

• Scattering on the Binet scales does not support the claim that unequal development is the specific characteristic of the feeble-minded; normal pupils scatter most and imbeciles least — related
• Scattering is considerably greater on the Stanford-Binet than on the earlier Binet-Simon scales, so conclusions about scattering differ according to the scale used — related
• Middle school students with the lowest baseline argumentative-writing scores showed the largest growth across essay attempts on an AES platform, while mid- and high-baseline students showed limited or no significant change — related