خلاصة:
Bilingualism is broadly defined as the ability to speak two languages; however, there are
a number of grey areas in determining which languages are first, second and third languages
(Keykhaie et al.,2015). Vocabulary learning and production are critical features in language
development. In every part of the world, there are signs of bilingualism. Promoting bilingualism
has many reasons. There are also different kinds of migration, intermarriage and vocational
opportunities. It is said that-more than half of the world’s population is bilingual and two thirds
of the World’s children grow up in a bilingual environment (Crystal, 1997).
Vocabulary learning and production are the key elements of language development. As a
result, over the past decade there has been an increasing importance to acquire words for
secondary languages. Learners has been pointed by many researchers and theorists. Learning
vocabulary is crucial to master a second language (Schmitt, 2008). Words are a vital part of the
language, as they identify items, actions, ideas which people may not understand in order to
express their intended meaning. In the field of theory and research, a growing recognition has
been given in recent years to the important role that language skills play in learning second or
foreign languages. In order to train vocabulary, a wide range of approaches, methods, exercises
and techniques have been put in place (Hatch & Brown, 1995).
This study is intended to measure the effect of bilingualism on vocabulary learning. To
this end, 42 female students from two Farhangian universities in Zahedan and Zabol cities were
selected by random sampling. The Oxford Placement Test (OPT) was used to homogenize the
participants. According to the results, 30 students were chosen and divided into two groups:
experimental and control group. standard vocabulary test including 25 questions as a post test
was administrated to the students and the results were analyzed by SPSS 27. The results
indicated that Sistani-Persian bilingual speakers outperformed in general Vocabulary learning