H. ÖZTÜRK (Thesis Author), A. S. ÖZBAY (Thesis Advisor), A longitudinal learner corpus investigation of the use and development of formulaic sequences in argumentative essays of EFL learners, 2021.

Ü. CEBECI (Thesis Author), A. S. ÖZBAY (Thesis Advisor), An investigation of preservice EFL teachers' digital literacy skills and the integration of these skills into teaching contexts with a special focus to the use of digital tools and their benefits, 2020.

S. KARA (Thesis Author), A. S. ÖZBAY (Thesis Advisor), EFL teachers' views and corpus analysis of English course books used in Turkish state schools in terms of authentic grammatical and lexical contents with a specific focus to the use of "must", 2020.

A. AKTÜRK (Thesis Author), A. S. ÖZBAY (Thesis Advisor) , Investigation of collocational priming in tertiary level Turkish EFL learners' mental lexicon, 2020.

T. AYDEMIR (Thesis Author), A. S. ÖZBAY (Thesis Advisor) , The investigation of semantic prosodic awareness levels of Turkish ELL students through near synonym words, 2020.

N. KELES (Thesis Author), A. S. ÖZBAY (Thesis Advisor) , A corpus-based semantic prosodic analysis of English intensifiers in native and non-native corpora with a special focus to their usage patterns and evaluative meanings, 2019.

H. I. KARATAS (Thesis Author), A. S. ÖZBAY (Thesis Advisor) , Corpus-based Interlanguage Analysis of Multi-word Combinations in Terms of Overuse and Underuse as Evidenced in Native and Non-Native Corpora, BATI DILLERI VE EDEBIYATI ANABILIM DALI, SOSYAL BILIMLER ENSTITÜSÜ, KARADENIZ TEKNIK ÜNIVERSITESI, TÜRKIYE, 2019.

M. ÖZER (Thesis Author), A. S. ÖZBAY (Thesis Advisor), Development and application of corpus-based teaching materials for the grammar course in a tertiary level EFL setting in Turkey, 2019.

H. TASKAYA (Thesis Author), A. S. ÖZBAY (Thesis Advisor), Phraseological awareness of tertiary level Turkish EFL learners as evidenced in native and non-native corpora, 2019.

D. BAKIRCI (Thesis Author), A. S. ÖZBAY (Thesis Advisor), The investigation of pragmatic competence levels of tertiary level Turkish EFL students with a special focus to their usage patterns of expressions of gratitude, 2019.

S. Ç. ERDOGAN (Thesis Author), A. S. ÖZBAY (Thesis Advisor) , The investigation of the linguistic and academic competences of the tertiary level exchange students with a special focus to the effects of their Erasmus experience, 2019.

Y. KURNAZ (Thesis Author), A. S. ÖZBAY (Thesis Advisor) , Pre-service EFL teachers' beliefs about communicative skills development and communicative approach in Turkish context, 2018.