The ABFM begins to use differential item functioning.
Thomas R
TR
O'Neill
Michael R
MR
Peabody
James C
JC
Puffer
D002568:Certification / Q000592:standards*; D004521:Educational Measurement / Q000379:methods / Q000592:standards*; D005194:Family Practice / Q000193:education / Q000592:standards*; D006801:Humans; D013044:Specialty Boards; D014481:United States