VALIDITY, RELIABILITY AND UTILITY OF THE 6-YEAR AGES AND STAGES QUESTIONNAIRE

Abstract

This dissertation has been accepted and approved in partial fulfillment of the requirements for the requirements for the Doctor of Philosophy degree in the Department of Special Education and Clinical Sciences by: Professor Jane Squires, Professor Michael Bullis, Profes-sor Debra Eisert, Dr. Deborah Olson, and Professor J. Andrew Berglund. Original approval signatures are on file with the University of Oregon Graduate School.

Keywords

• Parent-completed Developmental Questionnaire
• ASQ
• Validity
• Reliability
• Utility
• Confirmatory Factor Analysis
• 6-Year Ages and Stages Questionnaire
• Disability
• Developmental Screening
• Instruments
• Early Identification
• School-age Children