RT Article T1 Best Practices for Neglected Assumptions: Multi-Site Confirmation of the MPACT-6 JF Crime & delinquency VO 71 IS 6/7 SP 2032 OP 2060 A1 Mei, Xiaohan A2 Hamilton, Zachary K. 1979- A2 Kigerl, Alex A2 Krushas, Amber A2 Taxman, Faye S. 1955- LA English YR 2025 UL https://krimdok.uni-tuebingen.de/Record/1928271154 AB In the assessment world, risk determines ?who? to treat and needs determine ?what? (Bonta & Andrews, 2016). Yet, for youth, greater emphasis is placed on needs that target recidivism reduction interventions. Unlike risk, needs represent dynamic domains, or latent constructs, requiring testing to assure adequate measurement. We conducted a multi-level, multi-group analysis of the Modified Positive Achievement Change Tool (MPACT) with a 10-state sample of youth (N?=?258,464). Findings confirm the validity and reliability of needs domains, and the development of a novel ?Global Needs Factor,? a composite summary of needs. Created without criminal history/static measures, needs scales demonstrate predictive accuracy. Further, measurement invariance and aspects of gender and race/ethnicity prediction parity are observed. K1 Juvenile Justice K1 Measurement invariance K1 overclassification K1 risk-needs-assessment DO 10.1177/00111287231180096