To read the two articles:
Bias Training Has Little Impact on Police Behavior: Vermont Study
"A new study of the Vermont police has raised questions about the effectiveness of racial bias training.
The study, conducted by professors at the University of Vermont Economics Department and Cornell University researchers, found that despite small improvements in some departments, comprehensive training and education aimed at training officers to recognize and avoid racially biased practices 'did not by and large alter police behavior,' specifically for traffic stops."
New York Police Change Attitudes After Implicit-Bias Training
A program to fight implicit bias among New York Police Department officers successfully changed many officers’ attitudes, according to an analysis of the effort commissioned by NYPD officials.