Purpose: This study builds a new system for automatically assessing learners' speech elicited from an oral discourse completion task (DCT), and evaluates the prediction capability of the system with a view to better understanding factors deemed influential in predicting speaking proficiency scores and the pedagogical implications of the system.…

Language learning applications (LL Apps), especially those that can be downloaded to a mobile device, are popular, widely available and represent a potentially useful tool for language teachers and their students. However, concerns exist that many LL Apps are inadequately aligned with second language acquisition (SLA) theory, and/or poorly suited…