Primary Outcomes (explanation)
Attitudes towards Native American Sovereignty: sum of six Likert scale questions about support for Native American sovereignty
Attitudes towards US-Native American Treaties: sum of three Likert scale questions about support for the U.S. abiding by treaties with Native American tribes
Attitudes towards appropriation of Native American representation: sum of five Likert scale questions about the acceptability of non-Native people using Native imagery (for example, is it acceptable for a non-Native person to dress as a Native American for Halloween).
Likert scale quantified by: strongly disagree = -2, disagree = -1, neutral = 0, agree = 1, strongly agree = 2