While psychological testing can be very helpful, it is not definitive. Children who have ADD can appear not to have it when psychologically tested. This is because the structure, novelty, and motivation associated with the testing procedure can effectively, for the moment, “treat” the child’s ADD. The child may be focused by the one-on-one structure of the testing, focused by the novelty of the situation, and be so motivated to “do well” that the motivation overides the ADD. For these reasons, the clinical data—the teachers’ reports, the parents’ reports, the evidence of human eyes and ears
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