Investigations of the mind and brain: assessing behavioral and neural priming in L2 morphology

Demir, Orhan
The main goal of this thesis was to investigate the temporal and spatial properties of early morphological processing in a second language (L2). For this purpose, a computer-based masked-priming lexical decision task was implemented, which was followed by a functional magnetic resonance imaging (fMRI) experiment with minimal differences in the data collection procedure. The first experiment was completed by 122 L2 learners of English (L1: Turkish) and the participants of the fMRI study were a subgroup of the former experiment (n. 49). Additionally, in order to test whether L2 early morphological processing was modulated by individual differences, a series of tasks was administered at the end of the first experiment to classify participants according to their level of overall proficiency, spelling accuracy and vocabulary size. The results exhibited a morpho-orthographic decomposition pattern in L2 similar to the findings of the L1 literature. Overall proficiency was also found to be among the determining factors of visual word recognition in L2. As for the analyses of the fMRI data; unlike the L1 literature, left-frontal areas (BA6) were observed to be activated only in the processing of lexical items with links in the surface form but not in the meaning-based associations between primes and targets. Behavioral results laid v emphasis on the significant effect of frequency and proficiency on the early stages of morphological processing. On the other hand, neural findings of this thesis referred to the hemodynamic reflections in L2 on the basis of the distinctive properties of morpheme types.


Kahraman, Hasibe; Kırkıcı, Bilal; Department of English Language Teaching (2022-2-1)
The aim of this study was to examine how native speakers (L1) of Turkish, a morphologically rich language, process a second language (L2) which is morphologically less productive such as English. Critically, the study examined morphological priming effects together with a transposed-letter (TL) methodology using the same target word and compared the processing of derived word forms in L1 English speakers to that of L1 Turkish speakers of L2 English. Two masked primed lexical decision experiments were conduc...
The Morphological processing of derived words in L1 Turkish and L2 English /
Gacan, Pınar; Kırkıcı, Bilal; Department of English Literature (2014)
The primary goal of this thesis was to investigate the L1 and L2 processing of morphologically complex words by making use of psycholinguistic experimental techniques. Specifically, the question to be answered in the present study was how native speakers of Turkish process morphologically complex (derivational) word forms in L1 Turkish and in L2 English. It was also aimed at investigating the potential developmental similarities and/or differences between different L2 groups at distinct proficiency levels. ...
Coupling speech recognition and rule-based machine translation
Köprü, Selçuk; Yazıcı, Adnan; Department of Computer Engineering (2008)
The objective of this thesis was to study the coupling of automatic speech recognition (ASR) systems with rule-based machine translation (MT) systems. In this thesis, a unique approach to integrating ASR with MT for speech translation (ST) tasks was proposed. The proposed approach is unique, essentially because it includes the rst rule-based MT system that can process speech data in a word graph format. Compared to other rule-based MT systems, our system processes both a word graph and a stream of words. Th...
Evaluating working memory capacity and cognitive load in learning from goal based scenario centered 3D multimedia
Kilic, Eylem; Yıldırım, Zahide (2010-02-08)
The purpose of this study is to investigate working memory capacity and cognitive load in learning from Goal Based Scenario centered 3D multimedia learning environment (GBSc3DM) designed based on Cognitive Load Theory (CLT). GBSc3DM was developed in two versions. In the designed of the first version (+CLT) cognitive load principles were applied. In the second version (-CLT), however, the principles were violated. 47 11(th) grade high school students were selected based on their working memory capacity (WMC)...
Investigating the effects of individual interest and goal-orientation on ordinary and worthy performance
Akbay, Tuncer; Yıldırım, İbrahim Soner; Department of Computer Education and Instructional Technology (2018)
This dissertation aimed to investigate whether individual interest and achievementgoal orientations facilitate learning and task performance. Through quasi experimental design, we tested the hypothesized effects of individual interest, achievement-goal orientations, and their interactions on rote learning, meaningful learning, and worthy performance distinctly. In this investigation, 187 participants were grouped based upon their individual interest levels (high vs low) and achievement-goal orientations (ac...
Citation Formats
O. Demir, “Investigations of the mind and brain: assessing behavioral and neural priming in L2 morphology,” Ph.D. - Doctoral Program, Middle East Technical University, 2020.