factor-analyzed the primary traits in a sample
of 4,414 business employees and found
strong support for the 16PF global factor
structure. R. Gorsuch (pers. comm., February
2007) factor-analyzed the primary traits to
find the global traits on a sample of 11,000
test-takers, and then applied a common factor
analysis to the globals to confirm the thirdorder
factors. Hofer et al. (1997) used confirmatory
factor analysis and structural
equation modeling tests of factorial invariance
to study the measurement properties
of the questionnaire across six large, diverse,
samples (n = 30,732), and concluded that
‘the factor structure of the 16PF holds
remarkably well across radically different
samples of people, across gender, and across
different forms of the 16PF’ (266).