Knox Cubes

The Knox Cube Imitation Test (KCIT, or CIT, or KCT) was developed as a nonverbal intelligence test developed by Dr. Howard Andrew Knox, a medical officer at Ellis Island. It was first published as a pamphlet in 1913, and then in 1914 as a paper in the Journal of the American Medical Association.

Knox wrote:

There were several other tests presented in his paper besides the cube test. In the cube test, 4 black 1" cubes were placed in a row, each cube separated by 4 inches from its neighbors. The test administrators takes a smaller cube and taps on the 4 1" cubes in increasingly complicated sequences. The test subject is requested, sometimes only by sign language, to repeat the sequence. If the cubes are numbered 1 through 4, the sequences in order are:
:a. 1,2,3,4
:b. 1,2,3,4,3
:c. 1,2,3,4,2
:d. 1,3,2,4,3
:e. 1,3,4,2,1
and so on.

Knox suggested that sequence a (1-2-3-4) is reasonable for a child of 4 years of age, sequence b (1-2-3-4-3) is suitable for a 5-year-old, sequence c (1-2-3-4-2) can be accomplished by a 6-year-old, sequence d (1-3-2-4) can be done by the average 8-year-old, and copying sequence e (1-3-4-2-3-1) is expected by most 11-year-olds. Some of these sequences were repeated as part of other published tests such as Arthur (1947) and Wright & Stone (1979).{{Fact, date=February 2007

Performance on the Knox Cube Imitation Test is correlated with both verbal IQ and performance IQ.''Knox's cube imitation test : A historical review and an experimental analysis''
John T. E. Richardson, Brain and cognition, 2005, vol. 59, no2, pp. 183-213 ISSN 0278-2626

See also

* Henry H. Goddard
* Vineland Training School
*Simon (game)
* N-back

Notes

External links

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

Intelligence tests
Cognitive tests