Question: the first intelligence test to include a non-verbal scale as a measure of human intelligence

title: Stanford–Binet Intelligence Scales
text: Since its inception , the Stanford -- Binet has been revised several times . Currently , the test is in its fifth edition , which is called the Stanford -- Binet Intelligence Scales , Fifth Edition , or SB5 . According to the publisher 's website , `` The SB5 was normed on a stratified random sample of 4,800 individuals that matches the 2000 U.S. Census '' . By administering the Stanford -- Binet test to large numbers of individuals selected at random from different parts of the United States , it has been found that the scores approximate a normal distribution . The revised edition of the Stanford -- Binet over time has devised substantial changes in the way the tests are presented . The test has improved when looking at the introduction of a more parallel form and more demonstrative standards . For one , a non-verbal IQ component is included in the present day tests whereas in the past , there was only a verbal component . In fact , it now has equal balance of verbal and non-verbal content in the tests . It is also more animated than the other tests , providing the test - takers with more colourful artwork , toys and manipulatives . This allows the test to have a higher range in the age of the test takers . This test is purportedly useful in assessing the intellectual capabilities of people ranging from young children all the way to young adults . However , the test has come under criticism for not being able to compare people of different age categories , since each category gets a different set of tests . Furthermore , very young children tend to do poorly on the test due to the fact that they lack the ability to concentrate long enough to finish it .