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CTONI-2™
Comprehensive Test of Nonverbal Intelligence-Second Edition

Donald D. Hammill, Ed.D.
Nils A. Pearson, Ph.D.
J. Lee Wiederholt, Ph.D.

Technical Information


The CTONI-2 features all new normative data collected throughout 2007 and 2008.

The test was normed on a large representative national sample of 2,827 individuals.

Reliability
The normative data was stratified by age. The reliability coefficients of its composite are mostly in the .90s with a few in the high .80s. It correlates with most well known intelligence testing in the high .70s.

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QUICK FACTS

Authors Donald D. Hammill, Ed.D., Nils A. Pearson, Ph.D., & J. Lee Wiederholt, Ph.D.

Age Range 6–89.11

Administration Time 60 minutes

Administration Type Clinician-administered

Qualification Level B

Formats
  • Handscored

RELATED ASSESSMENT

SIT–R3