Developed to be free from the influence of language and cultural bias, the CTT assesses sustained attention in adults.

Two trials provide quantitative and qualitative information

Numbered circles are printed with vivid pink or yellow backgrounds that are perceptible to colorblind individuals. For Part 1, the respondent uses a pencil to rapidly connect circles numbered 1-25 in sequence. For Part 2, the respondent rapidly connects numbered circles in sequence, but alternates between pink and yellow. The length of time to complete each trial is recorded, along with qualitative features of performance indicative of brain dysfunction, such as near-misses, prompts, number sequence errors, and color sequence errors.

Features and benefits

• Retains the sensitivity and specificity of the original Trail Making Test but substitutes color for letters, making it more suitable in cross-cultural and special needs contexts.
• Instructions may be presented either verbally or with visual cues.
• Validity of the CTT has been documented in a variety of clinical and neuropsychological populations.

Note: Stopwatch is required for administration.