Knox's "Cube Imitation" Test

"A scale, based on the work at Ellis Island, for estimating mental defect" by Howard A. Knox, M.D., Assistant Surgeon, US Public Health Service, is the lead article in The Journal of the American Medical Association, March 7, 1914, LXII, 10, 741-747.

Dr. Knox writes: "From different sources have come many requests for the description of the tests worked out and conclusions reached in the practical work that has been done on Ellis Island on mental defectives. For this reason I present this paper, based on tests which I have made on over 4,000 suspected defectives in the last eighteen months and many more made by my associates ... all were considered sufficiently near the required standard to be allowed to pass, except 400 certified as feeble-minded and (in a few cases) as imbeciles."

Among the series of tests administered was "Knox's cube imitation test", now known as the "Knox Cube Test." Here is his description, which is the caption of Knox's Figure below. "Four 1-inch [black] cubes, 4 inches apart, are fastened to a piece of thin boarding. The movements and tapping are done with a smaller cube. The operator moves the cube from left to right facing the subject, and after completing each movement, the latter is asked to do likewise. Line a is tried first, then b, and so on to e. Three trials are given if necessary on lines a, b, c, and d, and five trials if needed on line e. To obtain the correct perspective the subject should be two feet from the cubes. The movements of the operator should be slow and deliberate." (The original apparatus is on display on Ellis Island.)

According to Dr. Knox, line a (1-2-3-4) should be accomplished at 4 years, b (1-2-3-4-3) at 5 years, c (1-2-3-4-2) at 6 years, d (1-3-2-4) at 8 years, e (1-3-4-2-3-1) at 11 years. Line d survived to form part of the 18-item Arthur (1947) version of the Knox Cube Test described in "Best Test Design" (Wright & Stone, 1979). Lines a, b, and c were reintroduced by Wright and Stone into their KCTB instrument.

John Michael Linacre

Knox's "Cube Imitation" Test Knox, H.A. … Rasch Measurement Transactions, 1999, 13:3 p. 708

Rasch-Related Resources: Rasch Measurement YouTube Channel
Rasch Measurement Transactions & Rasch Measurement research papers - free	An Introduction to the Rasch Model with Examples in R (eRm, etc.), Debelak, Strobl, Zeigenfuse	Rasch Measurement Theory Analysis in R, Wind, Hua	Applying the Rasch Model in Social Sciences Using R, Lamprianou	El modelo métrico de Rasch: Fundamentación, implementación e interpretación de la medida en ciencias sociales (Spanish Edition), Manuel González-Montesinos M.
Rasch Models: Foundations, Recent Developments, and Applications, Fischer & Molenaar	Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch	Rasch Models for Measurement, David Andrich	Constructing Measures, Mark Wilson	Best Test Design - free, Wright & Stone Rating Scale Analysis - free, Wright & Masters
Virtual Standard Setting: Setting Cut Scores, Charalambos Kollias	Diseño de Mejores Pruebas - free, Spanish Best Test Design	A Course in Rasch Measurement Theory, Andrich, Marais	Rasch Models in Health, Christensen, Kreiner, Mesba	Multivariate and Mixture Distribution Rasch Models, von Davier, Carstensen
Rasch Books and Publications: Winsteps and Facets
Applying the Rasch Model (Winsteps, Facets) 4th Ed., Bond, Yan, Heene	Advances in Rasch Analyses in the Human Sciences (Winsteps, Facets) 1st Ed., Boone, Staver	Advances in Applications of Rasch Measurement in Science Education, X. Liu & W. J. Boone	Rasch Analysis in the Human Sciences (Winsteps) Boone, Staver, Yale	Appliquer le modèle de Rasch: Défis et pistes de solution (Winsteps) E. Dionne, S. Béland
Introduction to Many-Facet Rasch Measurement (Facets), Thomas Eckes	Rasch Models for Solving Measurement Problems (Facets), George Engelhard, Jr. & Jue Wang	Statistical Analyses for Language Testers (Facets), Rita Green	Invariant Measurement with Raters and Rating Scales: Rasch Models for Rater-Mediated Assessments (Facets), George Engelhard, Jr. & Stefanie Wind	Aplicação do Modelo de Rasch (Português), de Bond, Trevor G., Fox, Christine M
Exploring Rating Scale Functioning for Survey Research (R, Facets), Stefanie Wind	Rasch Measurement: Applications, Khine	Winsteps Tutorials - free Facets Tutorials - free	Many-Facet Rasch Measurement (Facets) - free, J.M. Linacre	Fairness, Justice and Language Assessment (Winsteps, Facets), McNamara, Knoch, Fan

Forum

Rasch Measurement Forum to discuss any Rasch-related topic

Go to Top of Page
Go to index of all Rasch Measurement Transactions
AERA members: Join the Rasch Measurement SIG and receive the printed version of RMT
Some back issues of RMT are available as bound volumes
Subscribe to Journal of Applied Measurement

Go to Institute for Objective Measurement Home Page. The Rasch Measurement SIG (AERA) thanks the Institute for Objective Measurement for inviting the publication of Rasch Measurement Transactions on the Institute's website, www.rasch.org.

The URL of this page is www.rasch.org/rmt/rmt133j.htm

Website: www.rasch.org/rmt/contents.htm