task complexity

This article reports on the findings of a study that investigated the impact of manipulating task performance conditions on listening task performance by learners of English as a foreign language (EFL). The study was designed to explore the effects of changing complexity dimensions on listening task performance and to achieve two aims: to see how listening comprehension task performance was affected and to investigate possible overlaps between EFL learners’ perceptions of task difficulty and hypothesized task complexity. A purposive sample of 54 first-year EFL learners randomly assigned to two parallel conversation classes in an English department of a major public university participated in the study and performed listening tasks in a language lab. The instruments used for data collection were seven tasks taken from a TOEFL Test Preparation Kit, each followed by listening comprehension questions and an item on the participants’ personal perception of the difficulty of the task. During counter-balanced administrations, the tasks were manipulated for one of the four dimensions of task difficulty (adequacy, immediacy, perspective, and prior knowledge). The resulting data included the participants’ perception of difficulty as well as their performance scores under less complex and more complex conditions. One-sample T-test and correlation analyses of the data revealed that for all of the four complexity dimensions, the hypothesized less complex task condition led to better learner performance. The correlation between learner-assigned difficulty score for the task at hand and theoretical task complexity level was significant only for the immediacy dimension (r=-0.67, p<.05). The results offer support for task complexity frameworks, raise doubts about learners’ perceptions of tasks, and imply possibilities for task manipulation in language learning contexts.

The current study aimed to examine the effects of strategic planning, online planning, strategic planning and online planning combined (joint planning), and no planning on the complexity, accuracy, and fluency of oral productions in two simple and complex narrative tasks. Eighty advanced EFL learners performed one simple narrative task and a complex narrative task with 20 minutes in between. The order of the two stories was counterbalanced to control for any possible practice effect. The results suggest that no planning in both tasks was the least effective. Strategic planning led the learners to elevate both their complexity and fluency significantly in the narrative simple task and only their fluency in the complex task. Online planning helped the participants improve their accuracy significantly both in the simple and complex tasks. Finally, joint planning resulted in the significant elevation of accuracy and fluency in the simple task on the one hand, and complexity and accuracy in the complex task on the other. With respect to the effect of task complexity, the interaction between task complexity and CAF was significant. The results and comparisons between groups are discussed in the light of Levelt’s model of speaking, Skehan’s Trade-off Hypothesis, and earlier studies.

In L2 development, the cognitive complexity of tasks plays a crucial role in task performance and language features produced. However, there have only been few studies addressing the impact of task complexity on EFL learners' attention to L2 system and form-focused self-repairs (FFS).This study explores the role of increasing cognitive task complexity in EFL learners' form-focused attention (FFA) to L2 system (i.e. grammar, lexis, and phonology) and FFS and the effect of increasing procedural task complexity on EFL learners' FFA to L2 system and FFS. The participants comprised one hundred EFL junior students of TEFL. The sample was chosen from the cohort of EFL students at Islamic Azad and state universities in Isfahan and Shahrekod. The participants performed under task conditions of−/+ casual reasoning and −/+ planning time. After each stage, each participant filled in a Likert-type scale to examine his/her attention to different aspects of L2 system .Finally, Wilcoxon Signed Rank Test was used to compare the learners’ instances of of self-repairs at un-increased and increased task complexity occasions. Repeated-Measures ANOVA was used to examine the data. Results showed an overall effect of task complexity on EFL learners' attention to L2 system and FFA behavior across task types.

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.

This study examined the combined effects of two task complexity levels (i.e., high- and low-complex) and two planning conditions including pre-task planning and on-line planning on Iranian intermediate language learners’ speech production regarding complexity, accuracy, and fluency. To this end, 90 intermediate EFL learners from a language institute in Shiraz were randomly assigned into two control and four experimental groups. At first, the language learners in all groups participated in the speaking pretest. Presented with a series of picture description tasks, the participants were asked to narrate a story. During 10 treatment sessions of picture description task performance, the experimental and control groups attempted different planning time conditions including pre-task planning, online planning, and no-planning along with task complexity levels. Finally, following the last session, the posttest was administered to all participants. The narrations analysis, as well as the results of Mixed between-within groups ANOVAs and a series of one-way ANOVAs, manifested that language learners in the pre-task high complexity group outperformed all other groups in terms of complexity. Moreover, the online low complexity group and online high complexity group outperformed the pre-task planning low complexity, no-planning low complexity, and no-planning high complexity groups regarding accuracy. With regard to fluency, the pre-task planning low complexity group significantly outperformed the no-planning low complexity, no-planning high complexity, and online high complexity groups. It was also concluded that pre-task planning affected language learners’ speech fluency. The implications of the results are also addressed.

This study explored the impact of task complexity on task performance of Iranian lower-intermediate and advanced language learners. It also investigated how working memory was related to task performance and mediated the influence of complexity conditions on language performance. Task complexity was operationalized by designing differing tasks along the +/- reasoning and the +/- few elements dimensions. Eighty Iranian EFL learners (40 lower-intermediate and 40 advanced) carried out argumentative tasks which differed in complexity level. Working memory capacity was measured by applying the Persian translation of Wechsler's (1987) working memory test, and task performance was measured in terms of accuracy and fluency. The results revealed that for lower-intermediate learners, task complexity led to decrease in accuracy in the complex tasks, while fluency was boosted in simple task condition. For advanced learners, task complexity resulted in improved accuracy, while fluency decreased in complex condition. The results of multivariate analyses revealed that learners' language performance in the complex group significantly differed from that of the simple group on the combined dependent variables for both lower-intermediate and advanced learners. There was no significant correlation between working memory and any performance measures.

This quantitative study aimed to investigate the combined effects of two types of strategic planning, namely collaborative and teacher-led planning conditions and task complexity on Iranian intermediate language learners' oral production in terms of complexity, accuracy, and fluency. To achieve this purpose, 90 EFL learners were selected through convenience sampling from a language institute in Shiraz, Iran, and randomly assigned to two control and four experimental groups. The study adopted a quasi-experimental design in the form of pretest, treatment, and posttest. In the first step, all participants took part in a speaking pretest in which they were required to narrate a story based on a series of picture description tasks. While the experimental groups underwent 10 treatment sessions of picture description task performance along with two planning types i.e., teacher-led and collaborative planning conditions, the control groups were not allowed to plan the task performance. In the last session, the language learners took a posttest whose results were compared with those of the pretest. The findings revealed that the language learners in the collaborative planning groups outperformed the other groups in terms of both fluency and complexity. Further, teacher-led groups did better than the other groups in terms of accuracy. This study carries crucial implications for EFL teachers, material developers, syllabus designers, and speaking skill examiners.

Regardless of the appreciation of language learners’ achievement in task-based language teaching, not much has been hinged upon learners’ perception and reception of various elements. This study examined task complexity and modality effects on Iranian EFL learners’ comprehension of task difficulty, competencies, and difficulty-skill balance as well as the learners’ task experience. The Flow Outlook features were also applied to investigate how difficulty-skill balance anticipated flow experience. Via a repeated-measures design, and with a focus on task complexity (simple vs. complex) and task modality (written vs. spoken), 49 EFL learners carried out four argumentative tasks (two simple written and spoken vs. two complex written and spoken tasks); then, they ticked the flow questionnaire to gauge their perception of task difficulty, competence, and task experience. Repeated-measures MANOVA revealed although task complexity influenced task difficulty and difficulty-skill balance significantly, the skill was not affected significantly; task modality influenced task difficulty and skill significantly while difficulty-skill balance received no significant effect. The follow-up post hoc test indicated that complexity and modality significantly influenced flow, attention, and control, but not interest. Linear regression revealed difficulty-skill balance was a predictor for learners’ flow experience for both writing tasks and simple speaking task but not for complex speaking tasks. Pedagogically, the findings of this research may have some implications for English language teachers, learners, and materials developers.

Over the years, much research has been done on the role of tasks in L2 learning, but little is known about how sequencing tasks affects listening comprehension. Thus, the present study evaluated the effect of sequencing repeated familiar tasks (SRFT) along three dimensions of complexity i.e. +/- visual support, +/- few elements, and +/- planning time. Sixty upper-intermediate EFL learners were randomly selected as experimental group (n=30) and control group (n=30) in this experimental research. To control the homogeneity of the participants and their topic familiarity, the Success Placement Test designed by Fricker (2007) and the listening comprehension test (developed by Richards, 2005) were administered respectively. Then the posttest of listening for IELTS which included 3 levels of task complexity was employed to analyze the results of SRFT. The participants in the experimental group were required to listen to keeping fit tasks ordered from simple to complex tasks during 10 sessions. The participants in the control group performed disordered tasks. T-test and SPSS version 20 were utilized to analyze the tests. Before employing treatment, the placement test addressed that both of the groups obtained no marked difference level of English language knowledge. They also displayed the same topic familiarity of listening comprehension on the pretest. In the end, the t-test indicates a positive influence of SRFT for the experimental group in the posttest. The findings of this study recommend sequencing tasks in English classes as a basic tool to improve the listening performance of learners.