Frequently Asked Question:Is the CELF 4 standardization sample representative of my population? Answer:The CELF–4 norms are based on a standardization sample of 2650 children, adolescents, and young adults ages 5 through 21 years. The sample is representative of the U.S. population (as reported by the U.S. Bureau of the Census, 2000). The sample was stratified by age, sex, race/ethnicity, geographic region, and SES (based on parent education level). The CELF–4 standardization sample includes individuals with the full range of ability. The sample is an approximately equal distribution of low ability and high ability students across all ages, and includes students who are receiving special education services in approximately the same percentages that occur in the U.S. population. |
