Ph.D. Theses
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Browsing Ph.D. Theses by Author "Tekcan, Ali İ."
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Item Interrelationships between autobiographical memory specificity, executive functions and rumination in depression(Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in the Social Sciences, 2018., 2018.) Kızılöz, Burcu Kaya.; Tekcan, Ali İ.Depression is associated with reduced specificity of autobiographical memories (Williams & Broadbent, 1986), a phenomenon defined as overgeneral memory. It has been suggested that rumination, impairments in executive functions and functional avoidance underlie OGM (Williams et al., 2007). The present study has three main goals: 1) to examine whether different executive functions are affected by depression differently 2) to clarify the nature of the relationship between rumination and executive functioning deficits and 3) to examine the effects of cue type on memory specificity in depression. To reach these aims, participants were divided into two groups according to their Beck Depression Inventory (BDI) scores as high (n = 45) and low (n = 51) BDI participants. They then completed the Ruminative Responses Scale and EF tasks for shifting, updating and inhibition and reported important and word-cued ABMs. Results showed that word-cued memories resulted in more OGMs than important memories for all participants, regardless of BDI scores. Only shifting predicted specificity of autobiographical memories for word-cued memories but not for important memories. Consistent with earlier claims, certain EF deficits were related to OGM for word-cued memories, but no evidence of a link between rumination and OGMs was found.Item The bidirectional relationship between L1 and L2: Effects on event conceptualization and narrative discourse(Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in the Social Sciences, 2017., 2017.) Erciyes, Aslı Aktan.; Tekcan, Ali İ.; Aksu-Koç, Ayhan.The present study intended to answer two major research questions: 1) Whether intense exposure to a second language (L2) affects first language (L1) narrative skills of 5- and 7-year old children, and 2) whether learning a second language that is typologically different from the first affects their motion event conceptualization patterns? These questions were investigated by comparing bilingual children with their monolingual peers in terms of their narrative performance and motion event description patterns. In addition, children’s executive functioning and vocabulary performance were assessed. One-hundred and twelve 5- and 7-year- monolingual (L1, Turkish) (N=61) and bilingual (L1, Turkish; L2, English) (N=51) children participated in the study. Results showed that development of L1 narrative skills of the bilingual groups advanced at a slower pace compared to monolinguals and that there is a monolingual advantage in certain aspects including narrative quality and linguistic complexity. Motion event conceptualization patterns in both elicited L1 narratives and event descriptions showed that there is an influence of learning L2-English which is typologically different than L1-Turkish. Investigations of L2 narratives and motion event descriptions suggested a bidirectional relationship between L1 and L2. The study also confirmed bilingual advantage on inhibition and cognitive flexibility components of executive functioning. Results inform us about the early interactions between L1 and L2 for motion event conceptualization and narrative discourse.