Psychometric Properties of a Risk Tool Across Indigenous Maori and European Samples in Aotearoa New Zealand: Measurement Invariance, Discrimination, and Calibration for Predicting Criminal Recidivism.

Due to recent legal cases highlighting a lack of cross-ethnicity validity research using correctional risk assessment tools, we evaluated psychometric properties of Dynamic Risk Assessment for Offender Re-entry (DRAOR) scores across Maori (n = 1,812) and New Zealand (NZ) European samples (n = 1,211) in Aotearoa NZ. Using routine administrative data, our analyses suggested scoring properties were invariant across ethnicity for 15 of 19 items. Discrimination properties were also equivalent, but we observed a higher recidivism base rate among Maori participants, consistent with official statistics. Consequently, calibration analyses using a fixed follow-up (N = 372) demonstrated higher predicted recidivism rates for Maori participants at each DRAOR score. This suggests that Maori participants with similar levels of DRAOR-assessed need factors as NZ European participants experienced relatively greater continued justice contact. DRAOR users should prioritize delivering quality case management to clients, recognizing that both case-specific and systemic factors may underlie differential base rates.

Jury decision-making: the impact of engagement and perceived threat on verdict decisions.

The present study examined the role of political orientation and task engagement in juror decision-making. The study was conducted as a 2 (mode: laboratory versus online) × 2 (role: juror, observer) × 3 (evidence: admissible, inadmissible, control) between-subjects experiment, with participants (N = 157) recruited from a mid-sized Australian university. Findings supported our predictions that political conservatism is associated with convictions, and that university students endorse a wide range of political orientations. Participants who were more engaged in the study perceived more threat in the defendant, and threat, in turn, led to higher conviction rates; furthermore, the effect of participation mode on verdict decisions was completely mediated by perceptions of the threat posed by the defendant. Findings are discussed in terms of their implications for jury decision-making research and its relevance to actual juror decisions.