One of the most important skills of professionals who work with young children is the ability to assess developmental functioning through informal observation. This skill serves as the foundation for screening or identifying children in need of developmental services, conducting play-based developmental assessments, and helping parents to understand their child's behavior. This book provides a detailed listing of developmental skills and behaviors that children are likely to manifest during the period from birth through 5 years of age. Children's behavior is addressed across five domains: cognition, language, social-emotional functioning, motor development, and self-help skills. The cognitive profile addresses: (1) object use, including exploration, functional use, and problem solving; (2) discrimination/association/classification, including social, actions, and objects; and (3) symbolic representation including memory (object permanence), intentionality, drawing/writing/reading, and pretend. The language/communication profile addresses: (1) receptive language, including attention, discrimination, and comprehension; (2) pragmatics, including communicative functions and language usage; (3) verbal proficiency, including phonology, lexical forms, and grammatical forms; and (4) imitation, including spontaneous and elicited. The social/emotional profile addresses: (1) relational behaviors, including attachment, adults, and peers; (2) self awareness/expression, including emotional reactions, egocentrism, and independence/dependence; and (3) social conventions, including play with others, compliance with rules, and responsibility. The motor profile addresses: (1) fine motor, including grasp, reach, and object manipulation; (2) posture/balance, including head control, sit, and stand; (3) locomotion, including crawling, walking/running, and climbing; and (4) active motor, including throwing, jumping, and kicking. The adaptive functioning profile addresses: (1) eating; (2) self care, including toileting, dressing, and grooming; (3) clean up; and (4) daily living skills. (SD)