Intelligence Scale Intelligence Scale - Birth to 3.5 years Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III) PhenX protocol: Intelligence Scale - Birth to 3.5 years #820504 Suggest update to description in NCIT (we're not using their description, but their description says "from one to twenty-four months of age") Suggest update to description http://www.phenxtoolkit.org/index.php?pageLink=browse.protocoldetails&id=820504 A standardized tool designed to assess a child's development as compared to same-age peers. It has components that involve both direct observation and interaction with a child as well as caregiver questionnaires. It consists of five domains (cognitive, motor, language, social-emotional, and adaptive behavior). NCIT:C99150 The Sickle Cell Disease Neurology, Quality of Life, and Health Services Working Group recognizes that there is an age overlap between the Bayley-III and the Wechsler Preschool and Primary Scale of Intelligence-Fourth Edition (WPPSI - IV). The Working Group recommends that providers use their clinical judgment, consider the purpose of testing participants, and refer to the frequently asked questions section of the Pearson website for Bayley-III and the WPPSI-IV for guidance on selecting an age-appropriate test. Bayley Scales of Infant and Toddler Development, Third Edition Bayley Scale of Infant Development III Life stage: Infant, Toddler, Child Bayley-III