Intelligence Scale - 2 years, 6 months to 7 years, 7 months PhenX protocol: Intelligence Scale - 2 years, 6 months to 7 years, 7 months #820502 Sufficient WPPSI-IV Life stage: Toddler, Child Wechsler Preschool and Primary Scale of Intelligenc-Fourth Edition (WPPSI-IV) NCIT:C120256 Wechsler Preschool and Primary Scale of Intelligenc-Fourth Edition The Sickle Cell Disease Neurology, Quality of Life, and Health Services Working Group recognizes that there is an age overlap between the WPPSI-IV and the Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III) and between the WPPSI-IV and the Wechsler Intelligence Scale for Children-Fifth Edition (WISC-V). 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 the WPPSI-IV, Bayley-III, and the WISC-V for guidance on selecting an age-appropriate test. Wechsler Preschool and Primary Scale of Intelligence IV A standardized tool designed to assess the cognitive development in preschool and young children (up to age 7 years and 7 months). It consists of a battery of tests that allow an investigator to conduct a comprehensive evaluation of IQ. http://www.phenxtoolkit.org/index.php?pageLink=browse.protocoldetails&id=820502 SCDO:0000647 Wechsler Preschool & Primary Scale of Intelligence 4th Edition Intelligence Scale