Question: Describe the interpersonal determinants of consumer behavior: cultural, social, and family influences. Cultural infl uences, such as the general work ethic or the desire to accumulate wealth, come from society. Core values may vary from culture to culture. Group or social influences include social class, opinion leaders, and reference groups with which consumers may want to be affi liated. Family influences may come from spouses, parents, grandparents, or children.