Norms address people's perceptions of what other people approve of whereas norms address people's perceptions of what other people actually do.

"Injunctive" norms address people's perceptions of what other people approve of whereas "descriptive" norms address people's perceptions of what other people actually do.

Two types of norms are applicable to a social standards approach: descriptive norms and injunctive norms. Injunctive norms include impression of which practices are regularly affirmed or opposed. Descriptive norms include impression of which practices are ordinarily performed. They ordinarily allude to the impression of others' conduct.