Exploring The Role Of Online Dynamic Assessment On L2 Learners’ Speaking Ability

Rooted on Vygotsky’s social and cultural theory as the theoretical framework,the study conducted a one-to-one online experiment to adjust and feedback students’ oral expression and find the key points of learners’ ability changes,to infer more effective ways and means of mediation.This experiment is divided into a pre-test,five enrichments and a post-test.The experimental task is to retell while looking at pictures related to each other,and the experimental materials(articles and pictures)focus on the use of a Chinese particle "ba".Attention should be paid to learners’ grammatical accuracy,phonetic accuracy and fluency in the mediation process.The research was carried out by combining quantitative and qualitative analysis.Quantitative analysis examines the development and change of learners’ oral ability by examining the learning potential score,the change of the quantity and quality of the adjustment required by learners,the number and accuracy of "ba" sentences produced by learners.Qualitative analysis examines the key points of learners’ progress in specific grammatical points and phonetic points through Microgenetic analysis of learners’ discourses.The result shows that the interventional dynamic assessment can avoid underestimating the actual level of learners.Dynamic assessment can detect the learning potential of learners.Dynamic assessment can help learners internalize their grammatical knowledge and develop their oral Chinese ability.