From the LSA Inclusive Teaching Initiative, University of Michigan:

• "The students may not perceive the activity as relevant to the course and thus may exhibit resistance. Being clear about the purpose of the activity and your learning goals may help motivate engaged participation.
• It is possible that students may feel defensive about their values or even adversarial toward the values of others. Emphasizing the role of context and socialization in the development of values may help students take a non-judgmental approach to the activity.
• There is also a possibility that students may attempt to speak for others. Encourage students to use 'I' statements and speak only for themselves."