Q1: What is an IQ percentile?
IQ percentile indicates what percentage of the population scores lower than your IQ score. For example, being in the 90th percentile means your IQ is higher than 90% of people. IQ tests typically use a mean of 100 and standard deviation of 15.
Q2: What is considered a normal IQ percentile?
IQ percentiles between the 25th and 75th percentile (IQ scores roughly 90-110) are considered average. Most people (about 68%) fall within one standard deviation of the mean (85-115), which is considered normal range.
Q3: How accurate is this IQ percentile calculator?
This calculator uses the standard normal distribution with mean 100 and standard deviation 15, which is the most common IQ test scale (Wechsler scale). However, actual IQ tests may use different scales, and this is a simplified approximation for educational purposes.
Q4: What do different IQ percentile ranges mean?
Percentiles above 98th (IQ ~130+) are considered very superior. 90th-98th (IQ ~120-130) is superior. 75th-90th (IQ ~110-120) is high average. 25th-75th (IQ ~90-110) is average. Below 25th (IQ <90) is below average. These are general classifications and vary by test.
Q5: Can IQ percentile change over time?
IQ scores are relatively stable in adulthood but can be influenced by factors like education, health, and practice effects. Percentiles compare you to your age group, so they may shift slightly as you age or if you retake tests. However, significant changes are uncommon.
Q6: Should I be concerned about my IQ percentile?
IQ is just one measure of cognitive ability and doesn't define intelligence or potential. Many factors contribute to success, including emotional intelligence, creativity, motivation, and practical skills. If you have concerns about cognitive function, consult with qualified professionals for comprehensive assessment.