Major roles within a group include:
Responsible for chairing meetings.
Makes sure the meeting runs to time.
Takes and distributes the minutes of the meeting.
Someone who argues against the group’s position, to help determine the validity of that position.
Gives support to other roles by enthusiastically following.
More cynical observers suggest that group roles can be defined as:
Those people who get in and ‘do’ the work required.
People who manage to criticise or ‘knock’ whatever initiatives are suggested.
Those group members who neither do or knock but simply ‘watch’ what is going on.