Does collaborative dialogue increase intellectual humility about ethics and politics?

A large body of theoretical and empirical work suggests that engaging in rigorous but respectful and supportive dialogue should increase intellectual humility. We put this "collaborative dialogue hypothesis" to the test in three main studies (total <i>N</i> = 3,004 observations from <i>N</i> = 1,740 adolescents) plus three supplemental studies. Using quasi-experimental designs, Studies 1-2 tested whether students involved in an extracurricular program focused on collaborative dialogue about ethi