Figure 3From: Cross-diagnostic validity of the Nottingham health profile index of distress (NHPD)Impact of DIF on person measures. Scatterplot of locations (logit measures) of each person estimated from the NHPD after adjustment for DIF by means of item split (y-axis) compared to those obtained from the original items not adjusted for DIF but anchored by DIF-free item calibrations from the DIF-adjusted scale (x-axis).Back to article page