How effective are IQ tests?

“McGrew’s findings don’t apply only to those with IQs in the 70–80 range. No matter what IQ band you pull out from McGrew’s analysis, you’ll find the same thing. In fact, a law emerges. Using the most reliable IQ tests available today, McGrew notes that “for any given IQ test score, half of the students will obtain achievement scores at or below their IQ score. Conversely, and frequently not recognized, is that for any given IQ test score, half of the students will obtain achievement scores at or above their IQ score.” Clearly a child’s current discrepancy between IQ and achievement doesn’t necessarily indicate a learning disability.
But perhaps the biggest flaw in the severe discrepancy method is that it’s a fundamentally unintelligent method. It treats single IQ scores as the arbiter of truth, without looking at the person’s history and understanding the numbers in context. Responsible and intelligent use of IQ tests require us to consider the student’s overall pattern of strengths and weaknesses (not just on the IQ test but even more generally in terms of talents, and social and emotional functioning), life aspirations, developmental history, environmental circumstances, and opportunities to learn.”

Read full article here:
http://www.salon.com/2013/07/07/iq_tests_hurt_kids_schools_and_dont_measure_intelligence/

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