Group norm

From a sociological perspective, social norms are informal understandings that govern the behavior of members of a society.Social psychology recognizes smaller group units, such as a team or an office, may also endorse norms separately or in addition to cultural or societal expectations. In other words, norms are regarded as collective representations of acceptable group conduct as well as individual perceptions of particular group conduct. They can be viewed as cultural products (including values, customs, and traditions) which represent individuals' basic knowledge of what others do and think that they should do.

Furthermore, in the field of social psychology, the roles of norms are emphasized which can guide behavior in a certain situation or environment as "mental representations of appropriate behavior". For example, it has been shown that normative messages can promote pro-social behavior, including decreasing alcohol use and increasing voter turnout and sustainability. According to the psychological definition of social norms' behavioral component, norms have two dimensions: how much a behaviour is exhibited, and how much the group approves of that behavior. Both of these dimensions can be used in normative messages to alter norms and subsequently alter behaviors; for example, a message can target the former dimension by describing high levels of voter turnout in order to encourage more turnout. At the same time, norms also can be changed contingent on the observed behavior of others (how much behavior is exhibited). In fact, in Sherif (1936), one confederate was able to affect the development of a group norm related to the autokinetic effect.

Norms running counter to the behaviors of the overarching society or culture may be transmitted and maintained within small subgroups of society. For example, Crandall (1988) noted that certain groups (e.g., cheerleading squads, dance troupes, sports teams, sororities) have a rate of bulimia, a publicly recognized life-threatening disease, that is much higher than society as a whole. Social norms have a way of maintaining order and organizing groups.

Although not considered to be formal laws within society, norms still work to promote a great deal of social control. They are statements that regulate conduct. The cultural phenomenon that is the norm is the prescriber of acceptable behavior in specific instances. Ranging in variations depending on culture, race, religion, and geographical location, it is the foundation of the terms some know acceptable as not to injure others, the golden rule, and to keep promises that have been pledged. Without them, there would be a world without consensus, common ground, or restrictions. Even though the law and a state's legislation is not intended to control social norms, society and the law are inherently linked and one dictates the other. This is why it has been said that the language used in some legislation is controlling and dictating for what should or should not be accepted. For example, the criminalisation of familial sexual relations is said to protect those that are vulnerable, however even consenting adults cannot have sexual relationships with their relatives. The language surrounding these laws conveys the message that such acts are supposedly immoral and should be condemned, even though there is no actual victim in these consenting relationships.

...
Wikipedia