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Diagnosing Dyslexia using WISCBy Inderbir Kaur Sandhu, Ph.D
Q: My daughter is 10 years old and is in the 4th grade. She has recently completed the WISC 4th edition. Her test scores range her in the "average" marks.
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Visual Comprehension - 93/32
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Preceptual Reasoning - 102/55
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Working Memory - 116/86
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Processing Speed - 109/73
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Full Scale - 105/63
I am concerned that my daughter is dyslexic. Would these test results give me any information in regard to dyslexic? Please help me.
A: To diagnose dyslexia, specific psychological tests may be necessary and this includes the WISC (Wechsler Intelligence Scale for Children). It provides a comprehensive diagnostic assessment of a child's educational and cognitive strengths and weaknesses; hence any distorted scores may be detected. The ACID/AVID profiles (Arithmetic, Coding or Vocabulary, Information, and Digit Span) may be used for this purpose.
Dyslexia is a poor visual memory for words. It may be possible that some learning disabilities can cause IQ test to be lower than one would expect. If you suspect that your daughter may be dyslexic, this can affect her performance on these tests. Some reasons are such as the low processing speed that pulls down the scores.
If your daughter was given a WISC test, dyslexia and processing would definitely play a part. Although not always but nonverbal intelligence tests may give a clearer picture for these children. It is best that you get in touch with the psychologist who conducted the test for your daughter as the scores need to be seen in great detail and this may not be justified assuming based on a few scores only. The psychologist may then recommend a specific diagnostic test based on the interpretation.
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