Who Decides What Is Acceptable Speech on Campus? Why Restricting Free Speech Is Not the Answer.

Recent protests on dozens of campuses have led to the cancellation of controversial talks, and violence has accompanied several of these protests. Psychological science provides an important lens through which to view, understand, and potentially reduce these conflicts. In this article, we frame opposing sides' arguments within a long-standing corpus of psychological research on selective perception, confirmation bias, myside bias, illusion of understanding, blind-spot bias, groupthink/in-group bias, motivated skepticism, and naive realism. These concepts inform dueling claims: (a) the protestors' violence was justified by a higher moral responsibility to prevent marginalized groups from being victimized by hate speech, versus (b) the students' right to hear speakers was infringed upon. Psychological science cannot, however, be the sole arbiter of these campus debates; legal and philosophical considerations are also relevant. Thus, we augment psychological science with insights from these literatures to shed light on complexities associated with positions supporting free speech and those protesting hate speech. We conclude with a set of principles, most supported by empirical research, to inform university policies and help ensure vigorous freedom of expression within the context of an inclusive, diverse community.