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[{"key": "dc.contributor.author", "value": "Ruohonen, Elisa", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2012-09-24T04:46:16Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2012-09-24T04:46:16Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2010", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1231071", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/38622", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Heikkojen \u00e4idinkielen \u00e4\u00e4nteiden muistiedustusten on esitetty olevan merkitt\u00e4v\u00e4 tekij\u00e4 dysleksiassa eli kehityksellisess\u00e4 lukih\u00e4iri\u00f6ss\u00e4. Muistiedustusten tarkkuutta voidaan selvitt\u00e4\u00e4 esimerkiksi tutkimalla aivojen her\u00e4tevasteita. T\u00e4m\u00e4n tutkimuksen tarkoituksena oli selvitt\u00e4\u00e4, miten dyslektisten lasten muistiedustukset prototyyppisist\u00e4 \u00e4idinkielen \u00e4\u00e4nteist\u00e4 eroavat normaalisti lukevien lasten muistiedustuksista. Eroja tutkittiin tarkastelemalla prototyyppisten ja ep\u00e4prototyyppisten \u00e4idinkielen \u00e4\u00e4nteiden synnytt\u00e4mi\u00e4 LDN-vasteita.\nLDN-vaste (late discriminative negativity) on yhdistetty korkeamman kognitiivisen tason erotteluprosessointiin ja my\u00f6s muistiedustuksiin. LDN syntyy, kun toistettujen \u00e4rsykkeiden joukossa havaitaan poikkeava \u00e4rsyke. T\u00e4ss\u00e4 tutkimuksessa \u00e4rsykkein\u00e4 k\u00e4ytettiin suomalais-unkarilaista, ranskalaista ja saksalaista y-\u00e4\u00e4nnett\u00e4, joita esitettiin poikkeavina \u00e4rsykkein\u00e4 toistettujen \u00e4rsykkeiden joukossa. Koehenkil\u00f6in\u00e4 oli 72 i\u00e4lt\u00e4\u00e4n 8\u201311-vuotiasta normaalisti lukevaa ja dyslektist\u00e4 suomalaislasta. Vastetta tutkittiin viidelt\u00e4 eri LDN-vasteen aikaikkunalta, koska haluttiin tarkastella LDN-vasteen eri prosessointivaiheita. Aikaikkunat selvitettiin p\u00e4\u00e4komponenttianalyysill\u00e4, jonka tuottamia faktoripistem\u00e4\u00e4ri\u00e4 analysoitiin MANOVAn toistettujen mittausten menetelm\u00e4ll\u00e4. Vasteet muutettiin CSD-muotoon, jotta voitiin estimoida aktivaatioiden l\u00e4hteit\u00e4 tarkemmin.\nTutkimus tuki k\u00e4sityst\u00e4 dyslektikoiden heikoista \u00e4idinkielen muistiedustuksista, sill\u00e4 se osoitti, ett\u00e4 LDN-vaste oli normaalisti lukevilla lapsilla vahvempi prototyyppiseen \u00e4\u00e4nteeseen kuin dyslektisill\u00e4 lukijoilla. Vaste oli normaalisti lukevilla my\u00f6s vahvempi prototyyppiseen \u00e4\u00e4nteeseen kuin ep\u00e4prototyyppisiin \u00e4\u00e4nteisiin. Dyslektisill\u00e4 lukijoilla ei sen sijaan havaittu eroja \u00e4\u00e4nteiden v\u00e4lisiss\u00e4 aktivaatioissa, mik\u00e4 viittaa heikkoihin muistiedustuksiin prototyyppisest\u00e4 \u00e4\u00e4nteest\u00e4. Heikoista muistiedustuksista kertoo my\u00f6s se, ett\u00e4 dyslektisill\u00e4 lukijoilla ei syntynyt lainkaan LDN-tyyppist\u00e4 vastetta prototyyppiseen \u00e4\u00e4nteeseen lukuun ottamatta my\u00f6h\u00e4isint\u00e4 aikaikkunaa. T\u00e4ll\u00f6inkin vaste poikkesi huomattavasti normaalisti lukevien aktivaatiosta. Tutkimus osoitti, ett\u00e4 LDN jakautuu useampaan erilliseen prosessointivaiheeseen. Aiemmin LDN-vasteen on havaittu ilmenev\u00e4n fronto-sentraalisena aktivaationa, mutta eri prosessointivaiheiden tutkiminen sek\u00e4 CSD-muunnos osoittivat, ett\u00e4 LDN-vasteeseen liittyy my\u00f6s temporaalinen komponentti. Selvimm\u00e4t erot ryhmien v\u00e4lill\u00e4 ilmeniv\u00e4t t\u00e4ss\u00e4 temporaalisessa komponentissa.", "language": null, "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Miia Hakanen (mihakane) on 2012-09-24 04:46:15.817218. Form: Admin-lomake Pro gradu -t\u00f6ille (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/admin-lomake-pro-gradu-toille). JyX data:", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2012-09-24T04:46:16Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201209242495.pdf: 1908125 bytes, checksum: 2e3db1b86bfad335a30e12cc11f16ff0 (MD5)\nlicense.html: 107 bytes, checksum: a7d86e598caa500b1b433bbb9dc8ef1c (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2012-09-24T04:46:16Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201209242495.pdf: 1908125 bytes, checksum: 2e3db1b86bfad335a30e12cc11f16ff0 (MD5)\nlicense.html: 107 bytes, checksum: a7d86e598caa500b1b433bbb9dc8ef1c (MD5)\n Previous issue date: 2010", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "65 sivua", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "LDN (late discriminative negativity)", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": 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