Abdollahzadeh, S., & Kashani, F. A. (2011). The effect of task complexity on EFL learners’ narrative writing task performance. Journal of English Language Teaching and Learning, 8, 1-28.
Bailey, E. P., & Powell, P. A. (2008). The practical writer with readings. New York: Heinle & Heinle.
Choong, K. W. P. (2014). Effects of task complexity on written production in L2 English. (Doctoral Dissertation, Teachers College, Columbia University). Retrieved February 2015 from http://gigalib.org/index.aspx
Ellis, R. (2000). Task-based research and language pedagogy. Language
Teaching Research, 4(3), 193-220.
Ellis, R. (2003). Task-based language teaching and learning. Oxford: OUP.
Ellis, R. (2005). Measuring implicit and explicit knowledge of second language: A psychometric study. Studies in Second Language Acquisition, 27(2), 141-172.
Ellis, R. (2008). The study of second language acquisition. Oxford: OUP.
Ellis, R. (2009a). Task‐based language teaching: Sorting out the misunderstandings. International Journal of Applied Linguistics, 19(3), 221-246.
Ellis, R. (2009b). The differential effects of three types of task planning on the fluency, complexity, and accuracy in L2 oral production. Applied Linguistics, 30(4), 474–509.
Foster, P., & Skehan, P. (1996). The influence of planning on performance in task-based learning. Studies in Second Language Acquisition, 18(3), 299-324.
Gilabert, R. (2007a). Effects of manipulating task complexity on self-repairs during L2 oral production. International Review of Applied Linguistics in Language Teaching, 45, 215-40.
Gilabert, R. (2007b). The simultaneous manipulation of task complexity planning time and [+-Here-and-Now]. In M.D.P. Garcia-Mayo (Ed.), Investigating tasks in formal language learning (pp. 44-68). Clevedon, UK: Multilingual Matters.
Iwashita, N., McNamara, T., & Elder, C. (2001). Can we predict task difficulty in an oral proficiency test? Exploring the potential of an information processing approach to task design. Language Learning, 51(3), 401–436.
Kim, Y. (2009). The effects of task complexity on learner-learner interaction. System, 37(2),254–268.
Kuiken, F., & Vedder, I. (2007). Task complexity and measures of linguistic performance in L2 writing. International Review of Applied Linguistics, 45(3), 261-284.
Long, M. H. (1989). Task, group and task-group interactions. Unıversıty of Hawaii Working Papers in ESL, 8(2), 1-26. Retrieved August 21, 2014 from http://files.eric.ed.gov/fulltext/ED366184.pdf
Long, M. H., & Crookes, G. (1992). Three approaches to task‐based syllabus design. Tesol Quarterly, 26(1), 27-56.
Masrom, U. K., Alwi, N., & Daud, N. M. (2015). The effects of task complexity on the complexity of the second language written production. Journal of Second Language Teaching & Research, 4(1), 38-66.
Michel, M. C., Kuiken, F., & Vedder, I. (2007). The influence of complexity in monologic versus dialogic tasks in Dutch L2. International Review of Applied Linguistics, 45(3),241–259.
Norris, J. M., & Ortega, L. (2009). Towards an organic approach to investigating CAF in instructed SLA: The case of complexity. Applied Linguistics, 30(4), 555-578.
Nunan, D. (1989). Designing tasks for the communicative classroom.
Cambridge: Cambridge University Press.
Nunan, D. (1991). Communicative tasks and the language curriculum. TESOL Quarterly, 25(2),279-295.
Nunan, D. (2004). Task-based language teaching. Cambridge: CUP.
Rahimi, M. (2009). The role of teachers’ corrective feedback in improving Iranian EFL learners’ writing accuracy over time: Is learners' mother tongue relevant? Reading and Writing, 22(2), 219-243.
Rahimpour, M. (2007). Task complexity and variation in L2 learners' oral discourse. The University of Queensland Working Papers in Linguistics, 1, 1-9. Retrieved from https://www.library.uq.edu.au/
Rahimpour, M., & Hosseini, P. (2010). The impact of task complexity on L2 learners’ written narratives. English Language Teaching, 3(3), 198-205.
Révész, A. (2009). Task complexity, focus on form, and second language development. Studies in Second Language Acquisition, 31(3), 437–470.
Révész, A. (2014). Towards a fuller assessment of cognitive models of task- based learning: Investigating task-generated cognitive demands and processes. Applied Linguistics, 35, 87–92.
Révész, A., & Han, Z. (2006). Task content familiarity, task type, and efficacy of recasts. Language Awareness, 15(3), 160 – 179.
Robinson, P. (2001a). Task complexity, cognitive resources, and syllabus design: A triadic framework for examining task influences on SLA. In P. Robinson (Ed.), Cognition and second language instruction (pp. 287- 318). Cambridge: CUP.
Robinson, P. (2001b). Task complexity, task difficulty, and task production: Exploring interactions in a componential framework. Applied Linguistics, 22, 27-57.
Robinson, P. (2003). The cognition hypothesis, task design, and adult task- based language learning. Second Language Studies, 21(2), 45-105.
Robinson, P. (2005). Cognitive complexity and task sequencing: Studies in a componential framework for second language task design. International Review of Applied Linguistics, 43(1), 1–32.
Robinson, P. (2007a). Task complexity, theory of mind, and intentional reasoning: Effects on L2 speech production, interaction, and perceptionsof task difficulty. International Review of Applied Linguistics in Language Teaching, 45, 191-213.
Robinson, P. (2007b). Criteria for classifying and sequencing pedagogic tasks. In M. G. Mayo (Ed.), Investigating tasks in formal language learning (pp. 7-27). Clevedon: Multilingual Matters.
Robinson, P. (2010). Situating and distributing cognition across task demands: The SSARC model of pedagogic task sequencing. In M. Putz & L. Sicola (Eds.), Cognitive processing in second language acquisition: Inside the learner’s mind (pp. 243-268). Amsterdam: John Benjamins.
Robinson, P. (2011). Second language task complexity, the Cognition Hypothesis, language learning, and performance. In P. Robinson (Ed.), Researching task complexity: Task demands, task-based language learning and performance (pp. 3-38). Amsterdam: John Benjamins.
Robinson, P., Ting, S., & Urwin, J. J. (1995). Investigating second language task complexity. RELC Journal, 26(2), 62–79.
Romanko, R., & Nakatsugawa, M. (2010). Task sequencing based on the cognition hypothesis. In A. M. Stoke (Ed.), JALT2009 Conference Proceedings (pp. 436-445). Tokyo: JALT.
Salimi, A., Alavinia, P., & Hosseini, P. (2012). The effect of strategic planning time and task complexity on L2 written accuracy. Theory and Practice in Language Studies, 2(11), 2398-2406.
Salimi, A., & Dadashpour, S. (2012). Task complexity and SL development: Does task complexity matter? Procedia-Social and Behavioral Sciences, 46, 726-735.
Salimi, A., Dadashpour, S., & Asadollahfam, H. (2011). The effect of task complexity on EFL learners' written performance. Social and Behavioral Sciences, 29, 1390–1399.
Sercu, L., De Wachter, L., Peters, E., Kuiken, F., & Vedder, I. (2006). The effect of task complexity and task conditions on foreign language development and performance: Three empirical studies. ITL-Review of Applied Linguistics, 152, 55–84.
Shehadeh, A., & Coombe, C. A. (2012). Task-based language teaching in foreign language contexts: Research and implementation.
Amsterdam: John Benjamins.
Skehan, P. (1996). A framework for the implementation of task-based instruction. Applied linguistics, 17(1), 38-62.
Skehan, P., & Foster, P. (1997). Task type and task processing conditions as influences on foreign language performance. Language Teaching Research, 1(3), 185-211.
Soleimani, H., & Rezazadeh, M. (2013). The impact of increase in task cognitive complexity on Iranian EFL learners’ accuracy and linguistic complexity: A test of Robinson’s cognition hypothesis. International Journal of Basic Sciences & Applied Research, 2(5), 459-469.
Steenkamp, A., & Visser, M. (2011). Using cognitive complexity analysis for the grading and sequencing of isiXhosa tasks in the curriculum design of a communication course for education students. Per Linguam, 27(1), 11-29.
Thompson, C. (2014). Guided planning, task complexity and second language oral development.
(Doctoral dissertation, University of Central Lancashire). Retrieved August 2014 from http://clok.uclan.ac.uk/10568/2/Thompson
Van den Branden, K. (2006). Task-based language teaching: from theory to practice. Cambridge: CUP.
Vercellotti, M. L. (2012). Complexity, accuracy, and fluency as properties of language performance: The development of multiple subsystems over time and in relation to each other (Doctoral dissertation, University of Pittsburgh). Retrieved March 9, 2015 from www. http://d-cholarship.pitt.edu/12071/1/Vercellotti_CAF_v3.pdf
Wolfe-Quintero, K., Inagaki, S. & Kim H. -Y. (1998). Second language development in writing: Measures of fluency, accuracy, and complexity. Honolulu, HI: University of Hawaii Press.