IQ tests are standardized assessments designed to measure a person's intellectual abilities in relation to others. They typically evaluate various cognitive skills, including reasoning, problem-solving, and comprehension. The results are often expressed as an IQ score, which is intended to reflect a person's mental capacity compared to the general population. These tests can be used for various purposes, such as educational placement, assessing cognitive development, or identifying learning disabilities. However, it's important to note that IQ tests may not capture the full range of human intelligence, as they often focus on specific types of reasoning and knowledge.