These studies scrutinize, in a Dutch and Italian sample, various types
of consistency of the Big Five personality dimensions. Taking a gener
al taxonomy of situations and the five-factor scheme as points of depa
rture, an S-R Big Five Questionnaire, called TinSit, was constructed.
Using this instrument, generalizability across situations and trait ma
rkers was studied, as well as the consistency of Person X Situation in
teractions (individual situation specificity) and Person x Trait Marke
r interactions (individual response specificity). The results suggest
that the Big Five traits are less trait-like than the present proponen
ts of the model make us believe. In the Dutch as well as the Italian s
ample, substantial support has been found for individual situation spe
cificity and individual response specificity. Discussion addressed the
importance of these outcomes for the study of personality from an int
eractionist perspective.