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# Understanding autism

#### Typically developing (TD)

Term used (e.g. in research) to denote the kind of development which is seen in the majority of the population, as contrasted with the characteristics of people with a condition such as autism. It is often used in describing children as that is when most development is expected to occur, and when certain key milestones (such as walking and the onset of speech) are typically attained in a broadly regular sequence. (See also neurotypical.)

AUT_1