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.

Back to the top

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