Show simple item record

dc.contributor.authorConlon, Elizabeth G
dc.contributor.authorSanders, Mary A
dc.contributor.authorWright, Craig M
dc.date.accessioned2017-05-03T12:42:29Z
dc.date.available2017-05-03T12:42:29Z
dc.date.issued2009
dc.date.modified2010-06-24T05:21:14Z
dc.identifier.issn0028-3932
dc.identifier.doi10.1016/j.neuropsychologia.2008.12.037
dc.identifier.urihttp://hdl.handle.net/10072/30474
dc.description.abstractThe aim of the first of two experiments was to investigate the effect of practice on sensitivity to global motion and global form in a group of adults with dyslexia, a group of normal readers with visual discomfort, a group with dyslexia and visual discomfort, and a control group. In comparison to the control group, and regardless of the effect of practice, the group with dyslexia was significantly less sensitive to global motion. No differences in global motion sensitivity were found when individuals with dyslexia, with or without visual discomfort, were compared. The normal reading group with visual discomfort was less sensitive to global motion than the control group at baseline, but not when a second estimate of motion sensitivity was obtained. About 30% of the group with dyslexia had a global motion deficit on each threshold estimate. In contrast, there were no significant effects of practice or group on sensitivity to global form. In Experiment 2, performance on a number of cognitive and visual processing tasks was measured in four groups: two with dyslexia; one with and one without a global motion deficit, a normal reading group with visual discomfort, and a control group. The group with visual discomfort had reduced visual processing speed only. Regardless of whether a global motion processing deficit was present or absent in individuals with dyslexia, reduced accuracy was found on the language and visual processing measures, and on a rapid temporal sequencing task. Individuals with dyslexia and a global motion deficit had poorer accuracy than individuals with dyslexia and no motion deficit on the phonological processing and verbal short term memory tasks. We concluded that some adults with dyslexia have a persistent deficit when processing global motion but not global form. This is consistent with reports of a magnocellular pathway deficit in this group. Individuals with visual discomfort do not have a magnocellular processing deficit, but have perceptual difficulties when performing complex visual processing tasks.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeNetherlands
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom907
dc.relation.ispartofpageto915
dc.relation.ispartofissue3
dc.relation.ispartofjournalNeuropsychologia
dc.relation.ispartofvolume47
dc.rights.retentionY
dc.subject.fieldofresearchNeurosciences
dc.subject.fieldofresearchCognitive and computational psychology
dc.subject.fieldofresearchcode3209
dc.subject.fieldofresearchcode5204
dc.titleRelationships between global motion and global form processing, practice, cognitive and visual processing in adults with dyslexia or visual discomfort
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Health, School of Applied Psychology
gro.date.issued2009
gro.hasfulltextNo Full Text
gro.griffith.authorConlon, Elizabeth G.


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record