6.1: Unit A- Understanding Developmental Disabilities Last updated Save as PDF Page ID 67598 Erin O'Hara-Leslie, Amdra C. Wade, Kimberly B. McLain, SUNY Broome 6.1.1: What Is a Developmental Disability? 6.1.2: How Does Having a Developmental Disability Affect Normal Development? 6.1.3: Types of Developmental Disabilities 6.1.4: Effects of Developmental Disabilities on Growth and Development 6.1.5: How Is a Developmental Disability Different from Mental Illness?