We conducted several tests of the idea that an inclination toward thou
ght suppression is associated with obsessive thinking and emotional re
activity. Initially, we developed a self-report measure of thought sup
pression through successive factor-analytic procedures and found that
it exhibited acceptable internal consistency and temporal stability. T
his measure, the White Bear Suppression Inventory (WBSI), was found to
correlate with measures of obsessional thinking and depressive and an
xious affect, to predict signs of clinical obsession among individuals
prone toward obsessional thinking, to predict depression among indivi
duals motivated to dislike negative thoughts, and to predict failure o
f electrodermal responses to habituate among people having emotional t
houghts. The WBSI was inversely correlated with repression as assessed
by the Repression-Sensitization Scale, and so taps a trait that is qu
ite unlike repression as traditionally conceived.