Which screening tool is commonly used to screen development in infants and toddlers?

• A. M-CHAT
• B. Bayley Scales of Infant Development
• C. Ages & Stages Questionnaires (ASQ)
• D. Wechsler Preschool and Primary Scale

Answer: (C)

Developmental screening in infants and toddlers aims to quickly flag children who may have delays across multiple domains so they can get further evaluation. Ages & Stages Questionnaires fits this purpose best because it is a brief, parent-completed screener that covers several key areas—communication, gross and fine motor, problem solving, and personal-social development—and is validated for children from about 1 month up to 5 years. This broad, accessible format makes it a common first-step screening in primary care, allowing timely referral if concerns arise. Other tools have narrower or different purposes: M-CHAT focuses on autism-specific screening at toddler ages; Bayley Scales provide a detailed developmental assessment rather than a quick screen; Wechsler Preschool and Primary Scale is an IQ-focused test for preschoolers, not a general developmental screener.