مهین سادات طباطبایی

Processability Theory (PT) is regarded as one of the prominent theory of second language acquisition (SLA) developed to illuminate the developmental sequences in SLA as well as some other linguistic phenomena (Pienemann, 1998a; 2011).Since 1990s, Processability has been at the center of attention in second language acquisition research. Within the framework of Processability theory and through analyzing the written performance of Iranian EFL learners, the present research focused on the acquisition of “Copula inversion” and “Negation” across five proficiency levels, from elementary to advanced and compared it with the stage-like development model of morpho-syntactic structures proposed by Pienemann (1998a, 2011). The study followed a descriptive method of research and the data was collected from 350 participants in five different proficiency levels from elementary, pre-intermediate, intermediate, upper-intermediate and advanced. The participants were asked to provide samples of their written performance on different tasks such as introduction task, habitual action task, story retelling task, audio-video-retelling task, picture description task, composition, communication task. The data in this research was analyzed both qualitatively, in order to identify and classify the type and order of the morpho-syntactic structures; and quantitatively, by calculating means. The results of Kruskal-Wallis test revealed that “Negation” emerged at the elementary level of the language learners’ performance and “copula inversion” emerged at the intermediate level. Just the same, the competence of the learner grows stronger in concern with these variables through the higher proficiency levels. These findings imply that PT is valid for Iranian EFL learners, as well.   

Processability Theory (PT) is a theory of second language acquisition (SLA) developed to explain developmental sequences in SLA as well as some other phenomena. Within the framework of Processability Theory (PT) and through analyzing the written performance of Iranian EFL learners, the present research focused on the acquisition of the morpho-syntactic structures of “do- s- v (o)” across five proficiency levels, from elementary to advance and compared it with the stage-like development model of morpho-syntactic structures proposed by Pienemann (2005a). The study followed a mixed method design and the data were collected from 350 participants in five different proficiency levels from elementary, pre-intermediate, intermediate, upper-intermediate and advanced; furthermore, 45 pre-intermediate to advanced students were interviewed. The participants were asked to provide samples of their written performance on different tasks such as introduction task, habitual action task, and story retelling task, picture description task, composition, and communication task; furthermore, they were interviewed on the same topics. The data in this research were analyzed both qualitatively to identify and classify the type and order of the morpho-syntactic structures in the written and oral data, and quantitatively through inferential statistics. The results of Kruskal-Wallis test revealed that “do-subject- verb was concordant with Pienemann’s (2005a) model. This finding implies that PT is valid for Iranian EFL learners, considerably. The findings of this research can be of benefit for language teachers, learners, and syllabus designers.