RT Article
T1 A Look at the Difficulty and Predictive Validity of LS/CMI Items With Rasch Modeling
JF Criminal justice and behavior
VO 50
IS 1
SP 118
OP 138
A1 Giguère, Guy
A2 Brouillette-Alarie, Sébastien
A2 Bourassa, Christian
LA English
YR 2023
UL https://krimdok.uni-tuebingen.de/Record/1823691072
AB The current study aimed to provide data on the performance of items, dimensions, and the total score of the Level of Service/Case Management Inventory (LS/CMI), one of the most internationally used actuarial scales for the prediction of general recidivism in convicted persons. Using the full population of Quebec’s male incarcerated population evaluated between 2008 and 2015 with a 2-year follow-up (N = 15,961), results indicated that the predictive validity of the scale and its components was in line or better than effect sizes reported in other validation studies. A Rasch model was computed to obtain the difficulty parameter of LS/CMI items. Results indicated that items had varying levels of difficulty and covered the whole spectrum of the risk continuum. However, difficulty in Rasch was uncorrelated with the predictive validity of items, which casts a doubt on the applicability of some aspects of item response theory to actuarial scales.
K1 incarcerated persons
K1 convicted persons
K1 general recidivism
K1 actuarial scales
K1 Item Response Theory
K1 Rasch
K1 Predictive Validity
K1 Level of Service/Case Management Inventory (LS/CMI)
DO 10.1177/00938548221131956