Traits reputed to characterize adult children of alcoholics (ACOAs) and cod
ependent individuals were assessed among psychology undergraduates (n = 281
). Students self-reporting alcoholic parentage were no different from contr
ols on these traits or on self-reported drinking. Null effects are attribut
ed to sample characteristics and to systematic inattention to discriminant
validity concerns in the original trait formulations. Alcoholic parentage d
id affect willingness to self-label as ACOA and codependent. Also, regardle
ss of parentage, participants who self-labeled as codependent scored higher
on the signature traits than participants who did not self-label as codepe
ndent. This result is discussed with respect to recruitment pressures and s
elf-fulfilling-prophecy effects engendered by the widespread dissemination
of the ACOA. and codependency concepts.