On the problems of comparing dyslexics with other groups of readers (and the quest for the cognitive basis of dyslexia)

Abstract

Much of the research looking for the underlying cognitive deficit(s) in dyslexia involves comparing groups of dyslexics with groups of non‐dyslexic readers who are matched with the dyslexic group on some basis such as chronological age or their reading age. We review some of the findings obtained using this methodology, and also some of the problems and pitfalls associated with its use. The potential of other group comparisons in examining sources of reading difficulty is explored. Other groups which might usefully be compared with dyslexic readers include poor (generally backward) readers, good (or precocious) readers or hyperlexic readers. The significance of individual differences within groups for dyslexia research is also discussed.

Key Word:

• Dyslexia
• reading
• individual differences

Notes

This work was supported by grant number R000232002 from the Economic and Social Research Council of the United Kingdom

Additional information

Notes on contributors

Andrew W. Ellis∗

This work was supported by grant number R000232002 from the Economic and Social Research Council of the United Kingdom