Jimenez-Murcia S, Granero R, Fernandez-Aranda F, Arcelus J, Aymami MN, Gomez-Pena M, Tarrega S, Moragas L, del Pino-Gutierrez A, Sauchelli S, Fagundo AB, Brewin N, Menchon JM. Predictors of outcome among pathological gamblers receiving cognitive behavioral group therapy. Eur Addict Res. 2015;21(4):169-78. doi: 10.1159/000369528
Williams VSL. The "unbiased" anchor: bridging the gap between DIF and item bias. Appl Meas Educ. 1997;10(3):253-67. doi: 10.1207/s15324818ame1003_4