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¶

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? Average scattering exceeds the 1911 scale by 0.24 year and the 1908 scale by 0.61 year on the Stanford. → Wallin 1921 q2 i? The author treats the greater Stanford scattering as a peculiarity or weakness of that scale, linked to unusually low bases from single-test failures. → 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

Cross-scale comparison of average scattering across the same clinic populations, with the author's stated caveats about unequal numbers of tests, base-determination methods, and extent of testing across scales. The author reports being "struck by the unusually low bases which subjects frequently obtain in this scale."

"we find that the scattering is considerably greater in the Stanford scale, the average excess amounting to 0.24 year as compared with the 1911 scale, and 0.61 year as compared with the 1908."

Discussion¶

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
• Sex differences in scattering reverse across scales: girls scatter more on the 1908 scale, boys on the 1911 and Stanford scales — related
• 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 — related