The Organization Test exercises were scaled on 1634 children in grades three to eight, yielding difficulty values from .03 to 6.4 units¶

Claim · All claims
Evidence · 1 study · design r2 · q2
Currency · newest study 1928 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Seventy exercises were evaluated by the percentage of children solving each correctly and placed on a linear scale using the normal curve of probability, producing values from .03 to 6.4 units. → Greene 1928

Evidence¶

Greene 1928¶

Greene, H. A. (1928). Tests for the Measurement of Certain Phases of Linguistic Organization in Sentences. The Journal of Educational Psychology. https://psycnet.apa.org

q2 · i? · design · r2

Standardization study in which seventy mimeographed exercises were sent to cooperating school superintendents and principals and administered to children in grades three to eight. The article reports "1634 children in grades three to eight were used in the process", with exercise difficulty scaled by percentage correct on a linear scale via the normal curve, an application of Trabue's and Woody's methods.

"All told 1634 children in grades three to eight were used in the process. The evaluation was accomplished by using the percentage of children solving a given exercise correctly as a basis, and then placing the exercises in their relative positions on a linear scale by the use of the Normal curve of Probability."

Discussion¶

Related Claims¶

• Cumulative scoring of exercises in ascending difficulty yields a combined measure of rate and power, unlike last-exercise-solved power scoring — related
• The two test forms were built to pair exercises of closely the same value, equal total values, and similar inter-exercise intervals, with 100 total points per form
• Percentile-difference scales are crude and embody a fundamental fallacy because percentile units are not equal intervals — related
• Specific arithmetic problems were identified as troublesome through percentage analysis of test solutions — a narrower finding that bears on this claim