The CTONI-2 uses nonverbal formats to measure general intelligence of children and adults whose performance on traditional tests might be adversely affected by subtle or overt impairments involving language or motor abilities.

Uses both familiar and unfamiliar stimuli

• Six subtests (Pictorial Analogies, Geometric Analogies, Pictorial Categories, Geometric Categories, Pictorial Sequences, and Geometric Sequences) measure analogical reasoning, categorical classification, and sequential reasoning.
• Two different types of stimuli are used: pictures of familiar objects (e.g., people, toys, animals) and geometric designs (i.e., unfamiliar sketches and drawings).
• Oral instructions for common non-English languages in the U.S. are provided.

Versatile scores are based on updated norms

• Results are reported as standard scores, percentile ranks, and age equivalents.
• Normative data, collected in 2007 and 2008, were based on a large representative national sample (N = 2,827) that was stratified by age.
• Reliability coefficients of the composite are mostly in the .90s, with a few in the high .80s. The CTONI-2 correlates with most well-known intelligence tests in the high .70s.