Which of the Following Statements About Individuals' IQ Tests at Different

Multiple Choice

Which of the following statements about individuals' IQ tests at different ages is true?

A) The correlation between individuals' IQ scores at a particular age and their scores five years later is approximately .90.
B) On average, individuals' IQ scores increase 13 points between age 4 and age 17.
C) If IQ tests are administered according to instructions, there should be no change in an individual's IQ score with age.
D) Children who take an IQ test at age 12 and again at age 17 show an average change, up or down, of 9 points.