Correlational studies supporting the link between learners’ multiple intelligences and their learning are superseded by interventionist attempts to explore direct applications of Multiple Intelligence (MI) Theory in language teaching and learning. This quasi-experimental study examined the extent to which engaging ELT major university students in writing tasks, compatible to their dominant intelligences, might enhance the accuracy, organization, and fluency of their writing. The participants were 64 male and female English major sophomores. They were in three intact classes, randomly assigned to a control no task (NT) group, a task-supported (TS) group, and an MI-oriented task (MIT) group after their initial homogeneity was assessed. The fifteen-session treatment comprised pre-writing brainstorming activities in the NT group and a set of pre-writing tasks performed by the TS group. In the MIT group, however, individuals with the same dominant intelligences were grouped together to perform tasks that were compatible with their dominant intelligences. The one-way ANOVA analysis of the research data obtained from the post-test writing scores revealed that the MIT group surpassed the other groups in accuracy, fluency and organization. The findings underscore the necessity of taking learners’ intelligences into consideration as a criterion for task selection and offer important pedagogical implications for teaching writing.
