Abstract
This study aims to analyze students’ experiences in conducting self-assessment using the Duolingo Speak application in speaking skills learning at a higher education institution in Indonesia. The focus of this research covers five main aspects, namely: students’ self-assessment strategies, increased speaking confidence, improved vocabulary mastery, challenges encountered while using Duolingo Speak, and the enhancement of learner autonomy. This study employs a qualitative approach with a case study method, which aims to gain an in-depth understanding of students’ experiences in utilizing Duolingo Speak as a self-assessment tool in speaking learning. Data were collected through semi-structured interviews and documentation involving five students selected through purposive sampling, namely students who had used Duolingo Speak for at least one semester. The data were analyzed using thematic analysis through data organization, coding, theme identification, and conclusion drawing. The findings show that the use of Duolingo Speak provides positive learning experiences for students. The application helps students apply various self-assessment strategies, increases speaking confidence, enriches vocabulary mastery, and fosters learner autonomy. However, several challenges were also found, such as limitations in speech recognition accuracy and feedback that is not yet sufficiently detailed to support optimal reflective learning. Overall, Duolingo Speak can serve as an effective supporting tool in speaking skills instruction when combined with structured self-assessment guidance from lecturers, thereby enhancing the effectiveness of English as a Foreign Language (EFL) learning.
