What Is an IQ Test? A Complete Guide

Understanding IQ Tests

An Intelligence Quotient (IQ) test is a standardized assessment designed to measure human cognitive abilities and intellectual potential. The concept was first developed by French psychologist Alfred Binet in 1905.

How IQ Tests Work

Modern IQ tests evaluate multiple cognitive domains including logical reasoning, pattern recognition, spatial awareness, verbal comprehension, and mathematical ability. The average score is set at 100, with a standard deviation of 15 points.

Types of IQ Tests

There are several well-known IQ tests including the Wechsler Adult Intelligence Scale (WAIS), Stanford-Binet Intelligence Scales, and Raven's Progressive Matrices. Each measures different aspects of intelligence.

What Your Score Means

IQ scores are distributed on a bell curve. About 68% of the population scores between 85 and 115. Scores above 130 are considered gifted, while scores above 145 indicate genius-level intelligence.

Limitations

While IQ tests are valuable tools, they measure only certain types of intelligence. Emotional intelligence, creativity, and practical skills are not captured by traditional IQ assessments.