IQ Tests and Gifted Children Video
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with Carol Bainbridge

An IQ score is an Intelligence Quotient, which is a measure of intelligence and primarily reasoning ability. The higher the score, the greater the reasoning ability.Before you can understand what it means for a child to be highly gifted (or moderately gifted or profoundly gifted), you need to understand what IQ scores represent.

What Is an IQ Score?

If we took everyone's IQ scores and plotted them, we would see they would be distributed in a normal bell curve. That means that most scores would fall somewhere in the center of that bell curve. The score in the absolute center of the bell curve is 100 and that is where we would expect most scores to fall, or where we expect them to cluster. As the scores move away from the norm (100), we will find fewer and fewer scores. However, to make the numbers meaningful, we need to be able to measure the variability of the scores. That is the purpose of standard deviations, which is, quite simply, the average distance scores are from the norm.

Statistics of IQ Tests and Gifted Children

Statisticians determine the Standard deviation of data through a specific formula.The standard deviation used in many tests, including the Weschsler IQ test, is 15. The majority of test scores (which is about 70%) fall somewhere between one standard deviation below and one standard deviation above 100. That means most scores are somewhere between 85 and 115. Those scores are considered the "average" or normal intelligence range.