The VHB ICOG (Infant/child observation guide) uses these questionnaires in assessing child development. The VHB ICOG uses the Infant/Child Monitoring Questionaires originated by Jane Squires, Diane Bricker and Lawanda Potter of the University of Oregon.
With: Guide 1. The ASQ user's guide, second edition / by Jane Squires, LaWanda Potter, and Diane Bricker. Baltimore, MD : Paul H. Brookes, c1999 -- Guide 2. The ASQ:SE user's guide : for the Ages & stages questionnaires, social-emotional / by Jane Squires, Diane Bricker, and Elizabeth Twombly. Baltimore, MD : Paul H. Brookes, c2002