Group identification has been an important concept utilized by scholar
s for understanding the formation of political preferences by the mass
citizenry. This research tests two competing hypotheses that attempt
to explain longitudinal variation in the effect of group identificatio
ns on the preferences of the citizenry: Whether such change occurs (1)
as a result of shifts in the proportion of the electorate that identi
fies with a group or (2) as a result of the varying impact of group id
entifications on political preference. The evidence indicates that the
impact of group identifications on citizens' candidate preferences ch
anges in response to the political salience of the group, as others ha
ve predicted, accounting for variations in group voting patterns.