I see the new CELF®-5 is coming out. Are CELF®-4 scores still valid?
According to the Standards for Educational and Psychological Testing, published by the American Educational Research Association, American Psychological Association, and National Council on Measurement in Education, a test should be revised “when new research data, significant changes in the domain represented, or newly recommended conditions of the test may lower the validity of test score interpretations.” The CELF-5 was updated based on the USA’s changing demographic landscape and innovations in educational and clinical practices. Some educational programs require that a new edition of a test be adopted within 1–2 years; others do not have these requirements. The CELF®-4 does not automatically become “invalid” when the new test is released; however as time passes, the normative information collected in 2002 becomes less and less representative of the current population, therefore less appropriate for use as a measure for comparing students to same-age peers.