The catastrophe theory of attitudes (Latane and Nowak, 1994) predicts
that unimportant attitudes act as continuous dimensions, with normal d
istributions and gradual changes in evaluation, while important attitu
des act as categories, with bipolar or unipolar extreme distributions
and catastrophic (abrupt) changes in evaluation. A major derivation fr
om this theory is that attitude importance and extremity should be cor
related, with more important attitudes being more extreme. This predic
tion was confirmed for 14 specific political issues at both the group
and the individual level, as well as for political involvement and gen
eral liberalism. However, general political involvement was not relate
d to the extremity of evaluation For specific issues; similarly, parti
sanship predicted extremity of general liberalism but not extremity on
specific issues. Results suggest that attitude importance and extremi
ty must be measured at corresponding levels of specificity in order fo
r a relationship between them to hold. These results have implications
for attitude change in both individuals and societies.