Problem: Mr. T. is concerned about the poor academic performance of one of their students, 10-year-old Leo. One day, after class, Mr. T. reads Leo's school records and reads that Leo took an IQ test when he was in preschool. Leo's score on the test was 80. Considering the discussion on IQ and other variables such as language and cognitive development, Mr. T. should conclude that Leo's score in preschool is not a good measure of his capability at age 10.