1. 2004
2. Agreement in relative clauses and the theory of phrase structure : a study of Standard Arabic

   Mohamed Ali, A. (Awdur), Macdonald, P. (Goruchwylydd) & Deuchar, M. (Goruchwylydd), Ion 2004

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 2006
4. Language proficiency and academic achievement of monolingual Persian-speaking and bilingual Turkish-Persian-speaking primary school children in Quchan

   Elyasi, M. (Awdur), Deuchar, M. (Goruchwylydd), Tach 2006

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 2007
6. Evaluating competing models of codeswitching with reference to Mandarin/Tsou and Mandarin/Southern Min Data.

   Wang, S.-L. (Awdur), Deuchar, M. (Goruchwylydd) & Macdonald, P. (Goruchwylydd), Ebr 2007

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

7. 2010
8. Identifying word-order convergence in the speech of Welsh-English bilinguals

   Webb-Davies, P. (Awdur), Deuchar, M. (Goruchwylydd), Ion 2010

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

9. 2011
10. Flagging in English-Italian code-switching

    Rosignoli, A. (Awdur), Deuchar, M. (Goruchwylydd), Ion 2011

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth