[DSRP Evidence](https://dsrpevidence.org/)

# Partisan bias in a sorted party system: A problem of epistemic inequality

Pottle, 2026, American Journal of Political Science — Political Science

Patterns: [Relationships](https://dsrpevidence.org/pattern/relationships), [Perspectives](https://dsrpevidence.org/pattern/perspectives)

## In short

Whether a person's testimony is believed depends on the listener's partisan vantage point on the speaker's social group, a perspective-dependent credibility judgment that is causally produced by parties strategically mobilizing group identity.

## What they found (results)

The paper argues and models that because parties strategically mobilize group identities, members of groups associated with a party suffer greater 'testimonial injustice' -- their claims discounted based on perceived partisanship -- concentrating epistemic harm on marginalized groups.

These researchers were not testing DSRP. The finding is theirs; the correspondence to DSRP is drawn by this site.

[Source](https://doi.org/10.1111/ajps.70086)