Cognition Hypothesis

Building on Robinson’s (2001, 2003) Cognition Hypothesis, Skehan’s (1998) Limited Attentional Capacity Model, and Kellog’s (1986) model of writing, this study examined the effect of task planning on the fluency, accuracy, and complexity of 60 Iranian EFL learners’ argumentative and narrative writings under different planning conditions. A quasi-experimental design with three levels of planning conditions (pre-task planning, within-task planning and no-planning) and different time constraints was used. Measures of fluency, accuracy, and complexity were used to evaluate the quality of the participants’ written productions. The results of a series of one way Multivariate Analyses of Variance (MANOVAs) indicated that increasing task complexity, through task planning conditions and also different tasks produced significant differences among the groups in fluency and accuracy; however, with regard to syntactic complexity, both tasks provided similar results among the groups. The findings add support to the view that selecting an appropriate task with appropriate task-based implementation conditions can induce language learners to increase, accuracy and fluency, but not syntactic complexity of their output. Pedagogical implications are discussed and suggestions for further studies are made.

In the present study, two different models of task complexity; namely, limited attentional capacity model and cognition hypothesis were examined. To this end, the manipulation of cognitive task complexity along +/- single task dimension on Iranian EFL learners’ production in terms of fluency was explored. Based on the results of the writing test of TOFEL (2004), 48 learners were selected as the participants of the study and were divided into two groups, simple task group (STG, n=24) and complex task group (CTG, n=24). The participants in the STG were given an eight-frame picture which had been arranged in the correct sequence before its administration (+ single task). The participants in the CTG were given all the eight frames which were not arranged in their correct order. These participants were required to order the frames in the right sequence first, before starting writing (- single task). Their output was encoded based on the measure of fluency. One independent sample t-tests was run.  The results indicated that the participants significantly generated more words in the complex task. Based on the findings, it can be concluded that in the Iranian context, the predictions of limited attentional capacity model were more accurate.

Today, learners’ interaction and collaborative task performance have attracted increasing attention from language teachers and researchers. The present study investigated whether collaborative pre-planning, task complexity manipulation, and language proficiency level play a role in learners’ interactions. To this end, 128 EFL learners from two different language proficiency levels carried out three different tasks, whose complexity was manipulated based on Robinson’s task complexity framework. Retrospective semi-structured interviews were conducted which led the researchers to a better understanding of the unobservable underlying processes they underwent in the pre-task planning stage. The learners’ interactions were closely examined, analyzing all their language related episodes quantitatively as well as qualitatively. The results partially supported the Cognition Hypothesis and highlighted that cognitively demanding tasks provide more learning opportunities as learners confront more challenges, compared to undemanding tasks. The results were highly revealing about the process learners undergo in the pre-task planning stage, which can be considered by applied linguists, language teachers and material designers in providing considerable learning opportunities.