This study examined the construct validity of personality scales, a pe
rsonality-based integrity test, and homogenous biodata scales as refle
cted in their ability to discriminate white collar criminals from othe
r white collar employees. The sample included 365 prison inmates incar
cerated in 23 federal correctional institutions for white collar offen
ses, and 344 individuals employed in upper-level positions of authorit
y. A cross-validated linear discriminant function (DF) based on 16 var
iables selected in the developmental sample produced a large differenc
e (1.83 standard deviation units) between the two sample groups. The p
attern of score differences revealed the offenders as having greater t
endencies toward irresponsibility, lack of dependability, and disregar
d of rules and social norms. This study indicates that there are large
and measurable psychological differences between white collar offende
rs and non-offenders, and that the major construct underlying these di
fferences is ''social conscientiousness.'' The best measure of this di
fference was a personality-based integrity test.