Many 2-year-old infants enter a special program because of their very low IQ scores.Five years later,most of them have improved.Perhaps the program helped.What is another explanation?
A)On average, 7-year-olds have higher IQs than 2-year-olds.
B)Their scores increased because of the Flynn effect.
C)The IQ test for 7-year-olds is easier than the one for 2-year-olds.
D)Scores fluctuate on tests with low reliability.

Question

Quizplus · Accepted Answer

Scores on tests with low reliability can fluctuate significantly, meaning that initial low scores might not have been an accurate reflection of the children's true abilities. This could explain the improvement without attributing it to the program's effectiveness.

Many 2-Year-Old Infants Enter a Special Program Because of Their