Class crystallization is the degree to which mutually equivalent rank levels of different
rank systems coincide in their incumbents, thereby forming social classes and class
statuses. Through sample interviewing in Detroit, this variable is explored in its
bearing on three types of class consciousness. Evidence regarding two of these, class
status consciousness and class interest consciousness, suggests a positive relationship
with class crystallization. This finding does not hold for class barrier consciousness
which, instead, is fostered by the joint impact of weak crystallization and low status.
To account for these diverse results, a distinction between cognitive and affective
modes of class consciousness is proposed.