Kurzer Lewin-Interpersonal Communication ● primary group A primary group is a typically small social group whose members share close,personal,enduring relationships.These groups are marked by members'concern for one another,shared activities and culture,and long periods of time spent together.Examples include family,childhood friends,and highly influential social groups(team sports groups,academic groups,etc...). reference group A reference group is a sociological concept referring to a group to which another group is compared.Reference groups are used in order to evaluate and determine the nature of a given individual or other group's characteristics and sociological attributes.Reference groups provide the benchmarks and contrast needed for comparison and evaluation of group and personal characteristics. casual group People in a casual group interact on a less personal level than in a primary group,and their relationships are temporary rather than long lasting.Since casual groups are established to perform functions, people's roles are more interchangeable.Kurzer Lewin——Interpersonal Communication  primary group  A primary group is a typically small social group whose members share close, personal, enduring relationships. These groups are marked by members' concern for one another, shared activities and culture, and long periods of time spent together. Examples include family, childhood friends, and highly influential social groups (team sports groups, academic groups, etc...).  reference group  A reference group is a sociological concept referring to a group to which another group is compared. Reference groups are used in order to evaluate and determine the nature of a given individual or other group's characteristics and sociological attributes. Reference groups provide the benchmarks and contrast needed for comparison and evaluation of group and personal characteristics.  casual group  People in a casual group interact on a less personal level than in a primary group, and their relationships are temporary rather than long lasting. Since casual groups are established to perform functions, people’s roles are more interchangeable