Information exchange models predict heterogeneous groups deliberate better.

Evidence

Basic social psychological research on diversity provides some predictions about the impact of jury diversity on the quality of deliberations. Traditional information exchange models demonstrate that heterogeneity in a group setting exposes members of that group to a wider range of perspectives, which therefore increases the information that they absorb and the quality of discussion (e.g., Hoffman & Maier, 1961; Jehn, Northcraft, & Neale, 1999; Nemeth, 1986). Consistent with much of the literature on diversity and its ability to improve group decision-making (e.g., Sommers, Warp, & Mahoney, 2008; Stasser, Stewart, & Wittenbaum, 1995), increasing jury diversity has the ability to improve the quality of decision-making. — Joseph Avery, Jim Sidanius, Joel Cooper, Gregory Davis, Amanda N., Bias in the Law, 900

Categorization

• XREF: Mechanistic account of how diversity improves decisions; relevant to whether solidarity/identity homogeneous groups actually decide worse.
• corroborated: 2 independent passages support this claim — Joseph Avery, Jim Sidanius, Joel Cooper, Gregory Davis, Amanda N., Bias in the Law: A Definitive Look at…, 900