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The Checklist for Autism in Toddlers (CHAT) is a psychological questionnaire designed to evaluate risk for autism spectrum disorder in children ages 18–24 months. The 14-question test is filled out by the parent and a pediatrician or physician and takes approximately 5 minutes to complete. [ 1 ]
The first stage stratifies children into 3 group- low risk, medium risk, and high risk. Children who are medium risk go to the second stage for further clarification. A child whose score was greater than 3 at the first screening and greater than 2 on the second screening had a 47.5% risk of being diagnosed with autism spectrum disorder.
With a sensitivity of 66.7% and specificity of 78.8%, it can be used even by community level health worker for mass screening and takes around 5 minutes to complete. [2] Includes adequate mental and motor development milestones spread over the first 2 years. Requires only a pencil and a bunch of keys as test items. [citation needed]
The Denver Developmental Screening Test was developed in Denver, Colorado, by Frankenburg and Dodds and published in 1967. [3] As the first tool used for developmental screening in normal situations like pediatric well-child care, the test became widely known and was used in 54 countries and standardized in 15. [4]
This measure consists of a series of developmental play tasks and takes between 45 – 60 minutes to administer [1] [2] and derives a developmental quotient (DQ) rather than an intelligence quotient (IQ). [3] Raw scores of successfully completed items are converted to scale scores and to composite scores.
The first version, DC: 0-3, was published in 1994, to address the need for a systematic approach to the classification of disorders in the first few years of life. Used by mental health professionals , physicians, nurses, early educators, and researchers around the world, it has been published in 8 different languages in addition to the ...