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Louis Stokes Midwest Regional Center of Excellence

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  • Home/ Events/ 2023 LSMRCE Conference/ 2023 LSMRCE Conference/ Abstract Example 3 Bowen Mince

Abstract Example 3 Bowen Mince

Machine Learning in the Courtroom: Evaluating the Effectiveness of Algorithms to Predict the Likelihood of Recidivism

Bowen Mince1 and Wagih Henawi1
1 Department of Statistics, Grinnell College

The United States has both the largest prison population and the highest per-capita incarceration rate in the world. These metrics have increased in the past half-century, even outpacing population growth. To reduce the prison population in an unbiased manner, several algorithms have been created and implemented to predict the likelihood of recidivism of convicted people. In this work, we develop models using three types of algorithms (classification trees, random forests, and logistic regression) and then evaluate their accuracy in predicting recidivism using a data set from Broward County, Florida that tracked 10,372 criminals convicted in 2013 and 2014 over a 5-year period. The accuracy for each model ranges from 60% - 70%. However, the false-positive rate and false-negative rate varied significantly in each model regarding race. We then discuss the shortcomings of the current use of these algorithms in courtrooms throughout the United States and how they perpetuate systemic bias.

Acknowledgment: Shonda Kuiper, Department of Statistics, Grinnell College; Funded by Grinnell College through the Mentored Advanced Project (MAP).

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The Louis Stokes Midwest Regional Center of Excellence is funded by the National Science Foundation award numbers HRD-1826626 (IUPUI) and HRD-1826719 (CSU)(2018-2023).

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