Related Experiment Video
Updated: Aug 16, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
Published on: March 1, 2022
Knox's cube imitation test: a historical review and an experimental analysis
1Institute of Educational Technology, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK. J.T.E.Richardson@open.ac.uk
Abstract:
The cube imitation test was developed by as a nonverbal test of intelligence. Many variants show satisfactory reliability, but performance is correlated both with Verbal IQ and with Performance IQ. Performance is impaired by cerebral lesions but unrelated to the side of lesion. Examinees describe both verbal and visuospatial strategies. In a new experiment, performance was disrupted by concurrent random generation, manual tapping, and articulatory suppression. The cube imitation test is not simply a measure of the ability to retain visuospatial information but also depends on verbal representations as well as attentional capacity. Even so, the test was central to the modern appreciation that any adequate measure of intelligence must incorporate both verbal tests and performance tests.
Related Concept Videos
Correlation of Experimental Data
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity, and...
Introduction to Test of Independence
The test statistic for a test of independence is similar to that of a goodness-of-fit test:
Modeling and Similitude
Comparing Experimental Results: Student's t-Test

