Ja. Krosnick et al., ATTITUDE STRENGTH - ONE CONSTRUCT OR MANY RELATED CONSTRUCTS, Journal of personality and social psychology, 65(6), 1993, pp. 1132-1151
A variety of attributes differentiate attitudes that are stable and co
nsequential from those that are not, including extremity, certainty, i
mportance, knowledge, intensity, interest, direct experience, accessib
ility, latitudes of rejection and noncommitment, and affective-cogniti
ve consistency. Although these dimensions are clearly conceptually and
operationally distinct from one another, researchers have often assum
ed that some are interchangeable, or that two or more reflect common h
igher-order constructs. Three studies using multitrait-multimethod con
firmatory factor analysis assessed the relations among these dimension
s. Although some of these dimensions are strongly related, most are no
t, and a multifactor model seems necessary to account for their interc
orrelations. Thus, it seems most sensible to think of all of these dim
ensions as distinct rather than as multiple manifestations of a smalle
r set of underlying attributes.