Task Performance Measures: A Cognitive Perspective

To explore more about task performance in second language acquisition research, how task performance is measured turns out to be an indispensible topic with much concern from different perspectives. The present study takes the cognitive perspective to analyze the measures of the different aspects of task performance, i.e. fluency, complexity, accuracy and lexical performance. It is revealed that for the same construct of performance measures, different features are involved in different indexes. Multivariate measures of the same construct need to be adopted to seek an overall picture of learners’ task performance.