Skip to main content
. Author manuscript; available in PMC: 2014 Jan 13.
Published in final edited form as: Psychol Test Assess Model. 2013 Apr 1;55(2):127–147.

Table 2.

Non-uniform & Uniform Differential Item Functioning with respect to Education (n = 2,635 English speakers) at Baseline, 2nd visit & 3rd visit and (n = 7,221) English Speakers at Baseline of the “Entire” Dataset

Items Baseline (p = 0.005) 2nd visit (p = 0.005) 3rd visit (p = 0.005) Baseline entire (p = 5×10−8)

NUDIF UDIF NUDIF UDIF NUDIF UDIF NUDIF UDIF
Birth Year 0.3 no 0.05 no 0.4 no 0.4 no 0.6 no 0.08 no 0.3 no 0.01 no
Birth Day 0.8 no 0.07 no 0.6 no 0.5 no 0.6 no 0.9 no 0.1 no 0.6 no
Birth Month 0.6 no 0.7 no 0.4 no 0.08 no 0.9 no 0.8 no 0.9 no 0.4 no
Birth Province 0.8 no 0.9 no 0.3 no 0.3 no 0.3 no 0.3 no 0.3 no 0.2 no
Birth Town 0.8 no 0.5 no 0.8 no 0.5 no 0.5 no 0.8 no 0.6 no 0.8 no
Three Words 0.7 no 0.01 no 0.05 no 0.02 no 0.2 no 0.7 no 0.5 no 0.03 no
Counting 0.03 no < 0.001 yes < 0.001 yes < 0.001 yes 0.9 no < 0.001 yes 0.4 no < 5×10−8 yes
First Recall < 0.001 Yes < 0.001 yes < 0.001 yes 0.01 no 0.7 no 0.3 no < 5×10−8 yes 0.07 no
Today's Date 0.07 no < 0.001 yes 0.7 no 0.7 no 0.7 no 0.05 no < 0.001 no 0.3 no
Spatial Orientation 0.5 no 0.3 no 0.06 no < 0.001 yes 0.08 no 0.2 no < 0.001 no < 0.001 no
Naming 0.6 no 0.05 no 0.04 no 0.1 no 0.4 no 0.5 no 0.8 no 0.04 no
Four-legged Animals 0.4 no < 0.001 yes 0.02 no 0.3 no 0.05 no 0.6 no < 0.001 no 0.7 no
Similarities 0.3 no < 0.001 yes 0.4 no < 0.001 yes 0.01 no < 0.001 yes < 0.001 no < 5×10−8 yes
Repetition 0.6 no < 0.001 yes < 0.001 yes < 0.001 yes 0.5 no < 0.001 yes < 0.001 no < 5×10−8 yes
Read & Obey 0.5 no 0.01 no 0.6 no < 0.001 yes 0.2 no 0.03 no 0.9 no < 0.001 no
Writing 0.09 no < 0.001 yes < 0.001 yes < 0.001 yes 0.04 no < 0.001 yes < 0.001 no < 5×10−8 yes
Copying Pentagons 0.5 no < 0.001 yes 0.7 no < 0.001 yes 0.7 no < 0.001 yes 0.2 no < 5×10−8 yes
Three-stage Command 0.2 no 0.4 no 0.03 no 0.4 no 0.6 no 0.9 no 0.3 no 0.5 no
Second Recall < 0.001 yes < 0.001 yes < 0.001 yes 0.01 no 0.7 no 0.3 no < 0.001 no < 0.001 no