Medgyes (1992) defines a native English speaker as a person who was born in English speaking countries and can use the English language fluently and accurately with native-like competence as a first language. With regard to the definition of a non-native English speaker, Liu (1999) defines a non-native English speaker as a person who was born in non-English speaking countries and who can use the English language as a second or foreign language with non-native-like proficiency and competence.
Arva and Medgyes (2000) claim that “the primary advantage attributed to the NESTs lies in their superior English-language competence” (p. 360). NESTs (Arva & Medgyes, 2000). The other important advantage of the NESTs is their motivational impact on their learners in the classroom (Arva & Medgyes, 2000; Turnbull, 2001). Turnbull (2001) claims that NESTs’ exclusive use of English can make learners consider English as a real language in their real life instead of just an academic subject. Arva and Medgyes (2000) also mention that NESTs can give their learners the motivation “by virtue of using English as a genuine vehicle of communication” (p. 364).