Elevated levels of mixed-hand preference in dyslexia : meta-analyses of 68 studies
Abstract
Since almost a hundred years, psychologists have investigated the link between hand preference and dyslexia. We present a meta-analysis to determine whether there is indeed an increase in atypical hand preference in dyslexia. We included studies used in two previous meta-analyses (Bishop, 1990; Eglinton & Annett, 1994) as well as studies identified through PubMed MEDLINE, PsycInfo, Google Scholar, and Web of Science up to August 2022. K = 68 studies (n = 4660 individuals with dyslexia; n = 40845 controls) were entered into three random effects meta-analyses using the odds ratio as the effect size (non-right-handers; left-handers; mixed-handers vs. total). Evidence of elevated levels of atypical hand preference in dyslexia emerged that were especially pronounced for mixed-hand preference (OR = 1.57), although this category was underdefined. Differences in (direction or degree) of hand skill or degree of hand preference could not be assessed as no pertinent studies were located. Our findings allow for robust conclusions only for a relationship of mixed-hand preference with dyslexia.
Citation
Packheiser , J , Papadatou-Pastou , M , Koufaki , A , Paracchini , S , Stein , C C , Schmitz , J & Ocklenburg , S 2023 , ' Elevated levels of mixed-hand preference in dyslexia : meta-analyses of 68 studies ' , Neuroscience and Biobehavioral Reviews , vol. 154 , 105420 . https://doi.org/10.1016/j.neubiorev.2023.105420
Publication
Neuroscience and Biobehavioral Reviews
Status
Peer reviewed
ISSN
0149-7634Type
Journal article
Description
Funding: Julian Packheiser was supported by the German National Academy of Sciences Leopoldina (LDPS 2021-05).Collections
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