The topography of a group refers to its physical features. This includes such elements as the size of the group, the composition of the group, and the relationships between the various members of the groups. These topographical features of groups have been the focus of countless studies.
One obvious physical feature that could vary from one group to another is size. Some scholars have categorized group types in terms of size. For example, some researchers have found it useful to distinguish between small primary groups (from two to twenty group members), small nonprimary groups (from three to a hundred members), large groups (one thousand to ten thousand members), and largest groups (ten thousand-plus members). While such classifications may be interesting, the realities of everyday groups are typically more modest than such grand schemes would suggest. In a large number of settings, naturally occurring, free-forming groups typically range in size from two to seven persons, with a mean of about three. There are certainly exceptions to this rule of thumb; for example, most audiences watching theater troupes are considerably larger than three people. Nevertheless, most of the groups in which people interact on a day-to-day basis are relatively small. The size of a group tends to set the stage for many other topographical features of group life.
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