IQ Chart and Standard Scores | Understanding IQ Scores and Deviations

If you're curious about your intelligence quotient (IQ) score, you may have come across IQ charts that depict the average scores for different age groups. These charts are based on standardized IQ tests that measure cognitive abilities such as problem-solving, reasoning, and memory. In this article, we'll take a closer look at IQ charts, how they work, and what they can tell us about our intelligence.

Understanding IQ Scores

IQ scores are determined through standardized tests that are designed to assess an individual's cognitive abilities relative to others in their age group. The most commonly used test is the Wechsler Adult Intelligence Scale (WAIS) for adults and the Wechsler Intelligence Scale for Children (WISC) for children. These tests provide a composite score that represents an individual's overall cognitive ability.

The average IQ score is 100, with most people falling within the range of 85-115. Scores above 115 are considered above average, while scores below 85 are considered below average. Scores above 130 indicate high intelligence, while scores below 70 indicate intellectual disability.

Using IQ Charts

IQ charts are visual representations of IQ scores that help to put individual scores in context. They are typically organized into age groups to account for the fact that intelligence tends to increase with age until it plateaus in adulthood. An IQ chart will plot the average score for each age group and show the standard deviation, which is a measure of how much scores vary from the average. A standard deviation of 15 is common for IQ tests.

For example, if the average IQ score for 10-year-olds is 100 with a standard deviation of 15, then a score of 115 would be one standard deviation above the average and considered above average, while a score of 85 would be one standard deviation below the average and considered below average.

Get Your Free IQ Chart PDF Download

Interested in finding out more about IQ scores and how they're measured? Download our free IQ chart PDF from BizzLibrary.com. Our easy-to-read chart provides a clear overview of IQ scores by age group, as well as explanations of what those scores mean in terms of cognitive ability.

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