Clinical Protocols
July 20, 2026 • 6 min readAvoiding Chronological Age Documentation Errors in IEP & Clinical Reports
How a single day calculation mistake shifts normative scoring bands on WISC-V and CELF-5, and how to verify age outputs for school psychology reports.
The Impact of Calculation Errors in Special Education
In special education eligibility meetings, accurate chronological age computation is paramount. A miscalculation of even a few days can shift an examinee across normative table age bands, altering standard scores and percentile ranks on psychological and speech evaluations.