Visual perceptual strengths and weaknesses in adults with intellectual disabilities compared with a birth year-matched norm.
Background The ventral and dorsal streams are considered to be the brain substrates of vision for perception and action, respectively. Using the Developmental Test of Visual Perception (DTVP), the current study examined whether visual perceptual strengths and weaknesses in adults with intellectual d...
| Publicado en: | Journal of Intellectual Disability Research Vol. 57; no. 1; pp. 67 - 80 |
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| Autores principales: | , , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Wiley-Blackwell
Jan2013
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104396157&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104396157 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09642633 EUL jtl: Journal of Intellectual Disability Research issn: 09642633 maglogo: Y pubinfo: dt: Jan2013 vid: 57 iid: 1 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 104396157 84087753 10.1111/j.1365-2788.2011.01516.x NLM22233468 104396157 ppf: 67 ppct: 13 formats: fmt: @attributes: type: P tig: atl: Visual perceptual strengths and weaknesses in adults with intellectual disabilities compared with a birth year-matched norm. aug: au: Ikeda, K. Kasugai, H. Yamaguchi, A. Uchino, Y. Katase, H. Kanno, A. affil: Center for the Research and Support of Educational Practice, Tokyo Gakugei University, Koganei, Japan sug: subj: Visual Perception Evaluation Intellectual Disability Persons with Intellectual Disabilities Human Adult Comparative Studies Down Syndrome Frontal Lobe Physiology Male Female Intelligence Tests Descriptive Statistics Clinical Assessment Tools Post Hoc Analysis Analysis of Variance Correlation Coefficient Repeated Measures Adult: 19-44 years Male Female ab: Background The ventral and dorsal streams are considered to be the brain substrates of vision for perception and action, respectively. Using the Developmental Test of Visual Perception (DTVP), the current study examined whether visual perceptual strengths and weaknesses in adults with intellectual disabilities (ID) were attributable to the dichotomy of the visual streams. Method In study 1, DTVP performance was compared among mild, moderate and severe adult ID groups; study 2 contrasted adult ID groups with and without Down syndrome (DS). To prevent possible contamination by the Flynn effect, participants were matched by birth year with the norm of the DTVP original edition. Results Independent of the extent of ID among the three groups in study 1 and the aetiological group difference in study 2, relative strength was found for two DTVP tasks: eye-hand coordination and distinguishing target figures from interference background. Relative weakness was obtained in identifying a figural category. Participants with DS demonstrated exceptional weakness in discerning a target from either mirror-imaged or rotated alternatives, in addition to figural-category detection. Conclusions Visual perceptual strengths and weaknesses in persons with ID were difficult to explain on the basis of two visual streams. An interpretation originating in a different research context (e.g. frontal-lobe dysfunction) appears to be required for explaining visual perceptual weaknesses in persons with ID. For persons with DS, strong frontal-lobe dysfunction with atypical lateralisation might be the pathological determinant of visual perceptual weaknesses. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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