Ababy rolls over for the first time at a year is an example of atypical development no answer text provided. no answer text provided. typical development

The correct answer is atypical development.

The term child development refers to the biological and psychological changes occurring from the time of birth until the end of adolescence. There are specific milestones that a child reaches in terms of a typical development and these are cognition, language, motor coordination, social interaction and adaptation.

Sometimes a child can exhibit certain behaviours which fall outside the normal and typical development. These behaviours can either be manifested in a different way or pace to other children. In this case, the child's development is considered atypical. 

Rolling over is an important milestone for a baby and some babies are able to roll over even by the fourth month of age. Typically most babies master rolling over at the age of 5 or 6 months. Therefore, a baby that rolls over for the first time at 12 months of age falls under the atypical development.