Abstract
1. Introduction
2. Literature Review
2.1. English Pronunciation Ability
2.2. English Speaking Assessments
2.3. Shadowing Instruction
2.4. TTS-based Translation App Instruction
3. Method
3.1. Participants
3.2. Materials
3.3. Procedure
3.4. Data Analysis
4. Results and Discussion
4.1. Overall Speaking Ability
4.2. Overall Speaking Ability by Proficiency Levels
4.3. Overall Intelligibility and Fluency
4.4. Affective Attitudes
5. Conclusion and Implication
References