Background: Teacher praise is a powerful tool for enhancing student learning and managing behavioral challenges. However, existing methods for assessing teacher praise are overly simplistic, typically only relying on the frequency of behavioral special praise (BSP) to judge its effectiveness. Teacher praise serves as a means of conveying emotion, we categorized it according to emotional intensity. This approach seeks to examine how enhancing the intensity of praise influences student learning. Aimed: The core research objectives are: (1) to explore the classification of praise intensity; (2) to investigate whether the GPT tool can effectively influence teachers' praise intensity; and (3) to examine the direct and indirect effects of changes in praise intensity on student academic performance. Method: This study developed a praise intensity recognition assistant using GPT-3.5. A praise dataset was constructed and fine-tuned, achieving an accuracy of 95 %, demonstrating effective recognition. However, detecting and enhancing praise intensity remains a challenge. Sample: 20 teachers and 523 students participated in an intervention experiment focusing on praise intensity. Over a three-month period, we used this tool to observe whether improvements in teacher praise intensity affected student academic performance and learning behavior. Result: Findings revealed that while student academic performance showed no significant improvement, student engagement notably increased. Conclusion: Student engagement acted as a mediator, indicating an indirect link between teacher praise intensity and academic performance. This study underscores the indirect influence of enhanced praise intensity facilitated by GPT, highlighting the crucial role of student engagement in this process. © 2025 Elsevier Ltd
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