Redesigning the Central Eight: Introducing the M-PACT Six

Since their seminal work, Andrews and Bonta outlined the Central Eight assessment domains. As the landscape and utility of criminal justice assessments extended, tool developers expanded upon their initial development principles searching to further risk prediction gains. However, often overlooked in recent advancements is the foundation and usage of associated needs assessments. As a critical component of contemporary tools, particularly for youth, results of needs assessments identify and prioritize program placement. These additional tools comprise domain subscales that represent common predictors of need. Due to their latent nature, need assessment requires careful development and assessments of construct validity. While important, examinations of construct validity are seldom completed for contemporary tools, and their results rarely used for meaningful tool improvements. The current study describes the needs assessment development of the Modified Positive Achievement Change Tool (MPACT). Substantial psychometric evidence of construct validity is provided, describing the tool’s updated, six needs constructs.

Optimizing Youth Risk Assessment Performance: Development of the Modified Positive Achievement Change Tool in Washington State

The Positive Achievement Change Tool (PACT) was developed in 1997 using a theoretical construction of items, responses, and weights. While derived from an original tool created for a Washington State probation population, the risk-need assessment is one of the most widely used youth tools utilized today. To advance the model from its theoretical construction, the current study demonstrates tool updates making use of a large sample of Washington State youth ( N = 50,862). Specifically, several mechanisms were utilized to customize the assessment, including (a) item weighting, (b) outcome specificity, and (c) gender responsivity. Based on the updated design, we identify improvements in predictive validity of the continuous risk scale, accuracy of risk-level assignment, and reductions in racial/ethnic disparity. Scheduled to be implemented in the coming year, this article describes the development of the Modified Positive Achievement Change Tool (M-PACT).