The purpose of this study is to assess the effectiveness of Episodic Future Thinking (EFT) on improving medication adherence in atrial fibrillation (AF) patients taking oral anticoagulants. A total of 68 participants will be randomly assigned to the intervention group or the control group. Those in the intervention group will receive a 3-week EFT intervention in addition to the usual care, while those in the control group will receive the usual care only. Data on medication adherence, delay discounting (DD), and anticoagulation knowledge will be collected at baseline, end of intervention, and 3-month follow-up.