A child is tested by Alfred Binet. Her test results indicate that she has a mental age of 5. What does this mean?
◦ Her score is the same as the average score of a group of 5-year-olds.
◦ She is definitely 5 years old.
◦ She is probably developmentally disabled.
◦ There is no meaning that can be attached to the fact that she has a mental age of 5.