Which Statement BEST Summarizes the Conclusion That Is Supported by High-Quality

Multiple Choice

Which statement BEST summarizes the conclusion that is supported by high-quality evidence in this chapter's Practice Thinking exercises on whether reversing letters is the defining feature of dyslexia?

A) Although some studies show that individuals with dyslexia experience letter reversals, these individuals also show other symptoms, such spelling and phonological errors, that seriously challenge the letters reversal hypothesis.
B) Research studies clearly show that the problem with dyslexia is a visual problem, supporting the reversal of letters hypothesis of dyslexia and contradicting the phonological hypothesis.
C) The scientific research clearly demonstrates that letter reversals are a defining feature of dyslexia based on the evidence found by experts such as Orton (1925) .
D) The considerable number of people, including educators and some experts, who endorse the letters reversal hypothesis strongly supports the hypothesis that letter reversal is the defining feature of dyslexia.