Accuracy of Person-Fit Statistics
Christina St‐Onge, Pierre Valois, Belkacem Abdous, Stéphane Germain · Applied Psychological Measurement · 2011
Using a Monte Carlo experimental design, this research examined the relationship between answer patterns’ aberrance rates and person-fit statistics (PFS) accuracy. It was observed that as the aberrance rate increased, the detection rates of PFS also increased until, in some situations, a peak was reached and then the detection rates of PFS decreased with increases in aberrance rates. Furthermore, the results suggest that ECI2 Z was somewhat more robust to high levels of aberrance than l z , H T , and U3 when cheating was simulated. The results of this study shed light on a limitation of PFS analysis.