Wieczorreck, SophiePerst, FlorianSchubart, Constantin2025-09-262025-09-262025-09-222750-0721https://doi.org/10.56250/4081https://repository.iu.org/handle/123456789/4134Today's professionals are impacted by rapidly changing conditions, making teamwork increasingly im- portant. As a result, psychological safety in teams is becoming more relevant, as it leads to higher performance, successful collaboration, innovation, mutual support and appreciation. The behavior of a team´s leader has an impact on the team and its individual members, on the professional environment and on satisfaction. They can create trust and security or weaken or even destroy these through their leadership behavior. The aim of this study is therefore to investigate the influence of transformational, transactional, laissez-faire and authoritarian leadership styles on psychological safety using a quantitative online survey and to find out which characteristics have a promoting or inhibiting effect. The results show that transformational and transactional leadership styles have positive effects, while laissez-faire and authoritarian leadership styles have negative effects. Support and individual encouragement show strong positive effects, but transparent communication and the involvement of team members are also essential. Managers, on the other hand, should reduce control and supervision as much as possible. If managers avoid responsibility and decision-making, this also has an inhibiting effect on psychological safety in teams. This results in a large number of actions like support and transparent communication being recommendations for managers.dePsychologische SicherheitFührungsstileTeamdynamikTeamperformanceDiscussion Paperhttps://orcid.org/0009-0001-0426-6434