18 Incredible Places You Won't Believe Are Actually In London. Liberdade de Imprensa no Brasil - General Newton Cruz. Revolution News - Photos du journal. 26 Delightful Pictures Of The London Underground In The '70s And '80s. Guerra2. Khan Academy. Fun Maps For Young Travelers (And Others Like Them) Who Are the Smartest People on Earth? World Map of Average IQ Scores. An intelligence quotient, or IQ, is a score derived from one of several standardized tests designed to assess intelligence. When current IQ tests are developed, the median raw score of the norming sample is defined as IQ 100 and scores each standard deviation (SD) up or down are defined as 15 IQ points greater or less, although this was not always so historically. By this definition, approximately 95 percent of the population scores an IQ between 70 and 130, which is within two standard deviations of the mean.
IQ scores are used as predictors of educational achievement, special needs, job performance and income. They are also used to study IQ distributions in populations and the correlations between IQ and other variables. The many different kinds of IQ tests use a wide variety of methods.