Marcus's mother was proud of the fact that her baby crawled early, walked early, and was able to negotiate the stairs early. Marcus's mother had been studying __________.

Question

Quizplus · Accepted Answer

Developmental norms represent the average performance of a large sample of children of a given age. Marcus's mother was comparing his achievement of motor skills with the developmental norms for those specific skills to determine that Marcus's achievement was early.

Marcus's Mother Was Proud of the Fact That Her Baby