If two criteria correlate perfectly (or nearly perfectly) after correcting both for unreliability, then
they are equivalent. Criterion equivalence should not be taken lightly or assumed; it is a rarity in
HR research. Strictly speaking, if two criteria are equivalent, then they contain exactly the same
job elements, are measuring precisely the same individual characteristics, and are occupying
exactly the same portion of the conceptual criterion space. Two criteria are equivalent if it
doesn't make any difference which one is used.