A tendency is a shared bias openly acknowledged as a systemic bias by several people in a larger organization. If the tendency is so pronounced and irreconcilable that it can ultimately only be indulged by taking control of hte whole group, it will become a faction and remake decision making rules and systems. However most tendencies can be accomodated by existing structures and systems, and very few become factions because of the overhead and conflict involved.

The term tendency used in this way is originally a Trotskyite term.

A detailed proposal proposal to formally support tendency and declared bias appeared at Anarchopedia, in response to a stricter scheme to support factions. Unlike factions, a tendency would have no formal status but would serve to organize ratings and so on.