The average IQ for a 14-year-old is 100; however, most tests consider a person with an IQ between 90 and 109 to be of average intelligence. As of 2014, most IQ tests compare the individuals with others in their age group and set 100 as the average test score.
Once most children reach age 10, their scores on an IQ test remain consistent; however, some life events have the potential to change the child's score. Meeting a malnourished child's need for food sometimes increases his score on the test. IQ tests alone do not provide all the information to predict an individual's chance of success or failure.