Ages: birth through 36 months
Testing time: 20 minutes
REEL-4 is based on a contemporary linguistic model. It includes current studies related to normative base, reliability, and validity. The normative sample includes 1,019 infants and toddlers from around the nation. The demographic characteristics of the sample were matched to U.S. child population for the year 2019 reported in ProQuest Statistical Abstract of the United States 2018. The normative sample was stratified to on the basis of gender, race, Hispanic status, and geographic region. Standard scores, percentile ranks, and age equivalents are provided.
Consists of two core subtests, Receptive Language and Expressive Language, and a supplementary subtest, Inventory of Vocabulary Words. Results are obtained from a caregiver interview.
The average reliability coefficients for all test scores are high (exceeding .90). Test–retest studies show the REEL-4 is stable over time.
Studies of the test’s diagnostic accuracy (sensitivity, specificity, and ROC/AUC statistics) support its use for differentiating children with language impairment, low-functioning autism, and developmental delay from children with no exceptionalities
Complete kit includes Examiner’s Manual, 25 Examiner Record Booklets, and 25 Vocabulary Inventory Forms each for Forms A and B, all in a sturdy storage box.