What are the major early indicators that a child may have a developmental disorder?

Explanation:

Child psychology experts from the University of Oxford and University of Pittsburgh say that the term “disorder” should be used cautiously for children up to 5 years old, and question its validity. Professors Frances Gardner and Daniel S. Shaw say the evidence is limited that problems in preschool indicate problems later in life, or that behavioral issues are evidence of a true disorder. “There are concerns about distinguishing normal from abnormal behavior in this period of rapid miss behavior

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