Verbal items on the GRE Aptitude Test were
analyzed for race (white vs. black) and sex differences
in their functioning, using a new
procedure-item partial correlations with subgroup
standing (race or sex), controlling for total
score-as well as two standard
of subgroups’ item characteristic curves and
item difficulties. The partial correlation index
agreed with the item characteristic curve index in
the proportions of items identified as performing
differentially for each race and sex. These two indexes
also agreed in the particular items that they
identified as functioning differentially for the sexes,
but not in the items that they identified as performing
differently for the races. The partial correlation
index consistently disagreed with the item difficulty
index in the proportions of items identified as functioning
differentially and in the particular items involved.
The items identified by the partial correlation
index as performing differentially, like the
items identified by the other indexes, generally did
not differ in type or content from items not so
identified, with one major exception: this index
identified items with female content as functioning
differently for the sexes.
Stricker, Lawrence J. (1982). Identifying test items that perform differentially in population subgroups: A partial correlation index. Applied Psychological Measurement, 6, 261-273. doi:10.1177/014662168200600302
Stricker, Lawrence J..
Identifying test items that perform differentially in population subgroups: A partial correlation index.
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