Utjecaj fonotaktičke vjerojatnosti na leksičku obradu kod djece s disleksijom

master's thesis

• Title (english): The effect of phonotactic probability on lexical processing in children with dyslexia
• Author: Vesna Lovasić
• Mentor: Marijan Palmović (mentor)
• Committee member: Marijan Palmović (predsjednik povjerenstva)
• Committee member: Gordana Hržica (član povjerenstva)
• Committee member: Ana Matić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Education and Rehabilitation Sciences; Zagreb
• Defense date and country: 2019-09-26, Croatia
• Scientific / art field, discipline and subdiscipline: SOCIAL SCIENCES; Speech Therapy

Abstract

Leksička obrada složen jeproces koji se dugo godina istražuje u psiholingvistici, međutim još nije u potpunosti istražen. U radu se nastoji utvrditi utjecaj fonotaktičke vjerojatnosti na leksičku obradu kod djece s disleksijom uspoređujući rezultate s kontrolnom skupinom u 4. razredu osnovne škole. Istraživanje se temelji na Reicher-Wheelerovoj paradigmi (Reicher 1969; Wheeler, 1970), poznatoj kao zadatak leksičke superiornosti u kojem se koriste riječi i pseudoriječi varirane po fonotaktičkoj vjerojatnosti. Na taj način nastanu dvije skupine podražaja: riječi i pseudoriječi visoke fonotaktičke vjerojatnosti te riječi i pseudoriječi niske fonotaktičke vjerojatnosti. Leksička obrada promatrana je na dvije varijable: točnost i vrijeme reakcije. Rezultati pokazuju razliku između djece s disleksijom i kontrolne skupine na obje varijable leksičke obrade, međutim fonotaktička vjerojatnost pokazuje utjecaj samo na varijabli točnost leksičke obrade. Promatrajući utjecaj leksikalnosti i fonotaktičke vjerojatnosti, vidljivo je da utječu podjednako na obje skupine i to u istom smjeru. Rezultati upućuju na razlike u pozadinskim procesima leksičke obrade između obje skupine. Dok se kontrolna skupina tijekom leksičke obrade više oslanja na leksičko znanje, budući da brzo i automatski prepoznaju riječ, skupina djece s disleksijom više se oslanja na fonološko znanje. Promatrajući sve rezultate može se uočiti da se efekt superiornosti u većoj mjeri javio kod riječi visoke fonotaktičke vjerojatnosti u obje skupine, obzirom da je taj podražaj pokazao najbolje rezultate na objema varijablama točnost i vrijeme reakcije.

Abstract (english)

Lexical processing is a complex process that has been explored for many years in psycholinguistics but has not yet been fully explored. The aim of the study is to determine whether phonotactic probability has influence on lexical processing in children with dyslexia comparing the results with a control group in the 4th grade of primary school. The study is based on the Reicher-Wheeler paradigm (Reicher, 1969; Wheeler, 1970) also known as the lexical superiority task in which both words and pseudowords were manipulated in phonotactic probability. Thereby forming two groups of stimuli; words and pseudowords high in phonotactic probability and words and pseudowords low in phonotactic probability. Lexical processing was observed and analysed on both measures response time and accuracy. The results show the difference between both groups on both variables of lexical processing. However, phonotacic probability indicates impact only on accuracy of lexical processing. Phonotactic probability and lexicality seems to affect equally to both groups and in the same direction. The results indicate the differences in the ways of lexical processing between groups. While the control group relies mostly on lexical knowledge being able to recognize the word fast, children with dyslexia rely heavily on phonological knowledge. Overall, results show that the effect of lexical superiority largely occurred in words of high phonotactic probability in both groups, considering that the stimulus showed the best results both in variable accuracy and in response time.

• Keywords: leksička obrada; fonotaktička vjerojatnost; disleksija; Reicher-Wheelerov zadatak
• Keywords (english): phonotactic probability; lexical processing; dyslexia; Reicher-Wheeler paradigm
• Language: croatian
• URN:NBN: urn:nbn:hr:158:222092
• Study programme: Title: Graduate study of Speech and Language Pathology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra logopedije (magistar/magistra logopedije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-10-31 12:59:27