团队成员的专业知识水平和团队绩效：集体学习的调解作用和团队心理安全的调节作用。

Objective: In knowledge-intensive teams, members’ expertise is a critical resource for performance. We therefore examine how members’ levels of expertise (expertness) influence team performance via collective learning. More specifically, we predict that high overall expertness generates more diverse and higher-quality ideas from which all members can learn. Such learning, in turn, enhances team performance by enabling members to integrate one another’s knowledge and jointly reflect on potential solutions. At the same time, variation in expertness can impair collective learning and, thereby, te