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Such heterogeneous results could be due to the presence of wider variability in dyslexic samples, which is unlikely to be identified at the single study level, due to lack of power. To address this, this study reports a meta\u2010analysis of means and variances in high\u2010level visuospatial ability in 909 non\u2010dyslexic and 956 dyslexic individuals. The findings suggest that dyslexia is associated not only with a lower mean performance on visuospatial tasks but also with greater variability in performance. Through novel meta\u2010analytic techniques, we demonstrate a negative effect size for mean differences (\u2212.457), but a positive effect size for\n                    <jats:italic>SD<\/jats:italic>\n                    differences (+.118;\n                    <jats:italic>SD<\/jats:italic>\n                    ratio\u00a0=\u00a01.107). In doing so, this is the first study to demonstrate impoverished visuospatial processing of the majority of individuals with dyslexia in addition to greater variance in performance in this group. The findings advocate for further consideration of both the presence of, and reasons for, increased variance in perception, attention, and memory across neurodevelopmental disorders.\n                  <\/jats:p>","DOI":"10.1111\/bjop.12321","type":"journal-article","created":{"date-parts":[[2018,6,25]],"date-time":"2018-06-25T07:20:18Z","timestamp":1529911218000},"page":"897-916","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Meta\u2010analytic findings reveal lower means but higher variances in visuospatial ability in dyslexia"],"prefix":"10.1111","volume":"109","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0258-943X","authenticated-orcid":false,"given":"Rebecca","family":"Chamberlain","sequence":"first","affiliation":[{"name":"Department of Psychology Goldsmiths, University of London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicola","family":"Brunswick","sequence":"additional","affiliation":[{"name":"Department of Psychology Middlesex University London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joseph","family":"Siev","sequence":"additional","affiliation":[{"name":"Department of Psychology Brooklyn College City University of New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"I. 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