Empirical evidence on the conceptual and construct validity of the motivati
onal trait taxonomy proposed by Kanfer and Heggestad is presented. 228 adul
ts completed a shortened form of the Motivational Trait Questionnaire (MTQ)
, along with a battery of personality and ability measures. Relationships o
f the MTQ with personality measures show evidence of convergent and discrim
inant validity for trait constructs of Personal Mastery, Competitive Excell
ence, and Motivation Related to Anxiety. In addition, MTQ scale scores were
generally unrelated to composite measures of fluid and crystallised intell
igence. Examination of age differences showed a pattern of developmental de
cline in the achievement trait complex, but not the anxiety complex.