Ph.D. Theses
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Browsing Ph.D. Theses by Author "Gürel, Ayşe."
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Item Second language acquisition of nominal inflection in Turkish(Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in the Social Sciences, 2018., 2018.) Efeoğlu, Gülümser.; Gürel, Ayşe.This study aims to investigate second language (L2) acquisition of Turkish nominal inflectional morphemes by L2 learners with typologically distinct L1s, namely Russian, Japanese, English and Chinese. Two experimental tasks were used to collect data from a total of 90 participants (72 L2 learners and 18 native speakers of Turkish). The first task was a timed oral production task where participants were required to produce grammatical sentences using pictures with relevant lexical items. A total of 95 pictures, each depicting a specific event, were presented via DMDX. Thirty of these were used to elicit target morphemes (Ablative, Accusative, Dative, Locative Case and Plural suffix), 60 were used as fillers, and there were five trial items. The second task was a written forced elicitation task consisting of 40 multiple-choice items. The participants were asked to choose the option that best completes a given sentence. In addition to the experimental tasks, a cloze test was used to gather information about participants’ L2 Turkish proficiency. The most noticeable difference between the native and non-native groups was in the use of Accusative Case. Furthermore, as predicted by the L1 transfer view, while L2 learners with L1 Russian outperformed all other L2 groups in both tasks, L1 Chinese learners were the least accurate. Across the groups, Locative and Ablative Case morphemes were found to be used more accurately than Plural and Accusative Case in both tasks. The findings imply an accuracy order across L2 groups, governed mostly by L1 morphological features.Item The processing of morphology in adult second language acquisition(Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in the Social Sciences, 2017., 2017.) Kutlay, Nesrin.; Gürel, Ayşe.This study examines, via two masked priming experiments, the processing of inflectional and derivational morphology to identify whether first language (L1) and second language (L2) speakers of Turkish demonstrate comparable processing patterns (e.g., decomposition, full listing or a dual route) in these two types of morphological processes. The target verbs were the same and the primes were presented in four prime conditions in both experiments: i) Identity (ver, ‘give’ – VER, ‘give’); (ii) Inflected Test (verdi, ‘give’ + past tense suffix’ – VER, ‘give’); Derived Test (vergi,‘tax’: ‘give’ + noun-forming derivational suffix’– VER, ‘give’; (iii) Orthographically-related (verem, ‘tuberculosis’–VER, ‘give’), and (iv) Unrelated (bak,‘look’ – VER ‘give’). The items were matched in terms of frequency and length. High and low frequency primes were matched with high and low frequency bare target roots in four conditions (HL, HH, LH and LL). The reaction times (RTs) for each prime condition were compared and the effects of root and surface frequency were analyzed across L1 and L2 groups. The findings revealed that L1 speakers employed decompositional pattern in processing inflectional morphology but not derivational morphology. L2 speakers, on the other hand, did not display any facilitation effects either with inflected or derived primes. No clear frequency effects were observed in either group. Findings suggest that L2 learners diverge from L1 speakers in processing inflectional morphology but not derivational morphology. In addition, the processing difference between inflectional and derivational morphemes implies L1 speakers’ access to dual routes in Turkish.