An essential test for the signi cance of class examines variation in people's explanation for social reality. This explanation usually comprises two independent dimensions, structuralist explanation and individualist explanation. Whereas structuralist explanation emphasizes causal factors in society and social structure, individualist explanation concerns causal factors in the individual. Class theory predicts that members of the working class are more favorable to the structuralist explanation and less favorable to the individualist explanation than are members of middle and employing classes. Furthermore, it primarily proposes that the di erential explanation results from one's experience from work conditions, for instance, work alienation. This study tests these hypotheses explicitly with data collected from 276 married couples from Hong Kong. Results of structural equation modeling are in favor of hypotheses concerning e ects of class and their mediation through work alienation. These e ects appear to be more consistent than those of competing predictors including income, home ownership, education, age, gender, and religion. These ndings illustrate the plausibility of the learning-generalization model in interpreting class e ects.The signi cance of class is controversial in the recent literature (Evans 1993; Kingston 1994). On the one hand, critics of its signi cance o er pluralist and postindustrialist or postmodernist views about the ascendancy of alternative strati cation criteria and transformat ion of the economy (Clement and Myles 1994 ; Lash 1984). Pluralist critics hold that (1) gender, ethnicity, and sect ors are more important ways of strati cat ion (Marshall, et al.