What Is an IQ Test?
An IQ test is an assessment that measures a range of cognitive abilities and provides a score that is intended to serve as a measure of an individual’s intellectual abilities and potential. IQ tests are among the most commonly administered psychological tests.
In order to understand what these scores really mean, it is essential to look at exactly how these test scores are calculated. Today, many tests are standardized and scores are derived by comparing individual performance against the norms for the individual’s age group. While many tests utilize similar methods to derive their scores, it is also important to note that each test is different and scoring methods may not be the same from one test to another.
Types of IQ Tests
There are a number of different intelligence tests in existence and their content can vary considerably.2 Some are used with adults, but many are specifically designed to be administered to children.
Some commonly used intelligence tests include:
- Cognitive Assessment System
- Kaufman Assessment Battery for Children
- Stanford-Binet Intelligence Scale
- Universal Nonverbal Intelligence Test
- Wechsler Adult Intelligence Scale
- Wechsler Intelligence Scale for Children
- Woodcock-Johnson Tests of Cognitive Abilities
IQ tests can be used for a wide range of purposes including:
- Educational assessment and placement
- Assessment and diagnosis of intellectual disability
- Cognitive research
- Job candidate evaluation
- Assessing cognitive abilities including memory, speed, and attention
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