About the Haggerty Intelligence Examination Delta 2
M.E. Haggerty had served on the committee that produced the National Intelligence Tests in 1920. Almost immediately afterward, he produced his own group intelligence test, the Delta 2, designed to cover a wider grade range than the NIT and to use a single form across that range.
The Delta 2 covered grades 3 through 12 with a single test booklet. Items were calibrated so that the easiest were appropriate for grade 3 and the hardest were appropriate for high-school seniors. Scoring used a single point scale with norms for each grade.
Haggerty's Delta 2 was particularly useful for longitudinal cognitive studies because the same test could be administered to the same student multiple times over their school career. It was used in this way for several Minnesota school district studies in the 1920s and 1930s.
The 5 subtests
Take the interactive subset
Sample items at grade 7 difficulty.
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Source
All test materials and historical content on this page are transcribed from:
Haggerty, M. E. (1921). Haggerty Intelligence Examination Delta 2. Yonkers-on-Hudson, NY: World Book Company.
Public domain. Haggerty was Dean of the University of Minnesota College of Education and served on the National Intelligence Tests committee with Terman, Thorndike, Whipple, and Yerkes.
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