child development definition psychology
Child development refers to the biological, psychological and emotional changes that occur in human beings between birth and the end of adolescence, as the individual progresses from dependency to increasing autonomy.It is a continuous process with a predictable sequence yet having a unique course for every child.ome age-related development periods and examples of defined intervals are: newborn (ages 0â4 weeks); infant (ages 4 weeks â 1 year); toddler (ages 1â3 years); preschooler (ages 4â6 years); school-aged child (ages 6â13 years); adolescent (ages 13â19).