The Vocabulary Test of the California Cognitive Assessment Battery (CCAB)

Objective. We report the design and metric properties of the vocabulary test of the California Cognitive Assessment Battery (CCAB), which adaptively delivers 24 trials from a 600-word list ordered by difficulty, and describe the demographic variables associated with vocabulary test performance. Method. 2,181 English-speaking adults aged 18-89 completed 24 four-alternative synonym items administered as a 1-up/1-down staircase over 60 difficulty levels, with step sizes that started large (4 levels) and decreased after successive performance reversals. Two scores were compared: the QuickSIN estim

This content is for informational purposes only and is not medical advice. It is not intended to diagnose, treat, cure, or prevent any disease. Consult a healthcare professional before starting any supplement, treatment, or program: especially if you are pregnant, nursing, taking medication, or managing a health condition.