Michaela Is 24 Months Old and She Still Has Not

Multiple Choice

Michaela is 24 months old and she still has not spoken her first word.All four of her brothers spoke their first words at about 12 months of age, which is typical for most children.In this example, which general developmental concept does Michaela's lack of speech illustrate?

A) maturational development
B) holistic development
C) normative development
D) ideographic development