Investigating relationship between fluid and crystallised intelligence and vocabulary size in students learning French as a foreign language


  • Seyyedeh Soudeh Mirsaeedghazi University of Canberra, Canberra



In this study, the relationship between fluid and crystallised intelligence and vocabulary size was investigated among Iranian students learning French as a foreign language. Studies emphasised on the importance of vocabulary size and language comprehension and tried to discover mental and intelligence factors related to this issue. To administer the present quantitative study, the Persian Adaptation of Baddeley’s (1968) Grammatical reasoning Test for Fluid Intelligence, Persian Test of Baghaei & Tabatabaee (2015) for Crystallised intelligence, and Nation’s (2012) Test of Vocabulary Size were instrumented. Population of the study was 100 intermediate learners of French language from three branches of Safir institute in Tehran. Data was analysed using SPSS and correlational tools to specify the variables correlation. Result showed that there is a significant relationship between crystallised intelligence and size of vocabulary (p<0.1), while there was no significant relationship between fluid intelligence and vocabulary size (p>0.5). It was concluded that fluid intelligence does not predict learners’ vocabulary size, but crystallised intelligence as grows gradually determines learners’ vocabulary size.


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