The NRC committee trialed some twenty tests on five thousand children and produced two series of group intelligence tests of high reliability¶

Claim · All claims
Evidence · 1 study · design r? · q1
Currency · newest study 1919 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q1 i? After selecting some twenty tests and trying them on five thousand children, then on several thousand more, the committee produced two series of group tests of general intelligence of a high degree of reliability. → Bell 1919

Evidence¶

Bell 1919¶

Bell, J. C. (1919). Editorial: The National Research Council. The Journal of Educational Psychology, Volume X, No. 9. https://en.wikipedia.org/wiki/Journal_of_Educational_Psychology

q1 · i? · design · r?

The editorial reports the committee's development procedure: selection of "some twenty tests," a careful trial "on five thousand children," and re-trial "on several thousand more children" to perfect the procedure. It describes the vetting process as printed, without statistical detail.

"After detailed study the committee selected some twenty tests and gave these a careful trial on five thousand children. From these tests two series were selected which seemed to give the most satisfaction, and in order to perfect the procedure and to still further check up on the results the tests were tried on several thousand more children."

Discussion¶

Related Claims¶

• A National Research Council committee secured a $25,000 General Education Board grant to develop intelligence tests for school children — related
• The editor predicts NRC group tests will make intelligence testing a routine school measure and open the way for adjusting school work to pupil needs — related
• Group scales allow examining fifty or a hundred children in an hour, whereas individual Binet testing restricts use to special cases — related
• The National Intelligence Tests, prepared by a committee under National Research Council auspices with $25,000 from the General Education Board, are probably the most reliable group tests — a broader claim this one bears on