The predictive influence of intelligence and communicative language ability on school achievement

Abstract

Although numerous studies show that intelligence, measured by various tests, is a significant predictor of school achievement, this cognitive variable can only explain about 50% of the variance. It is also known that communicative language ability represents an important basis for learning subject content in the early period of formal education. One of the most comprehensive models of language ability (Bahman, Palmer, 1996), in addition to strategic knowledge, includes language knowledge that includes organizational language knowledge (grammatical and textual) and pragmatic language knowledge. Although the non-cognitive factors de facto participate in the explanation of school success, the aim of the research presented in this paper was to determine the predictive influence of intelligence and communicative language ability, i.e. organizational and pragmatic language knowledge on differences in school achievement in Serbian, English and Mathematics at the end of the first half of the fifth grade. The research was conducted on the sample of 197 fifth-grade students (51% girls, average age 11.5 months) in elementary schools in Loznica. The authors of the paper applied an adapted form of the test of communicative language abilities that was applied in research in a bilingual context (Šimonji-Černak, 2005). Revisk was used to test verbal and manipulative intelligence (Biro, 1997). We started from the assumption that organizational language knowledge, has a more significant predictive influence on differences in school performance in the above-mentioned subjects than intelligence. Hierarchical regression analysis model determined that the predictor variables of organizational language knowledge explain 36.8% - 49.4% of the variance in school achievement, while the intelligence variables are related to the achievements in Serbian and Mathematics and explain 0.6% - 3% of the variance. A significant partial contribution of pragmatic knowledge and knowledge of verbs as an element of grammatical language knowledge were determined in all three subjects, as well as the contribution of knowledge of grammatical rules only in the Serbian language.The results confirm the hypothesis and indicate that for success in the mother tongue, foreign language and mathematics it is important to develop grammatical knowledge, and pay special attention to the importance and strategies of developing pragmatic language function in the period of early formal education.