The Q-CHAT is a normally distributed quantitative measure of autistic traits in children 18-24 months old. It is the first ASC screening instrument, designed for use with toddlers, that has been shown to produce a range of scores that approximates to a normal distribution.
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- The Q-CHAT (Quantitative CHecklist for Autism in Toddlers): A Normally Distributed Quantitative Measure of Autistic Traits at 18-24 Months of Age: Preliminary Report. J Autism Dev Disord 38(8): 1414-1425 ().