何时选择可以增强动力，以及如何增强动力？感知选择和目标框架的调节调解模型

This study explored the interactive effects of choosing (vs. no-choice) and goal framing (i.e., intrinsic vs. extrinsic) on students’ motivation and whether perceived choice mediated these effects. Three hundred fifty-one sixth-grade students participated in a 2 (choosing vs. no-choice) × 2 (intrinsic vs. extrinsic goal framing) experiment. Results showed that choosing increased motivation under intrinsic goal framing but decreased motivation under extrinsic goal framing. Moderated mediation analyses indicated that choosing enhanced perceived choice under intrinsic goal framing, leading to hig