See the earlier blog post "Interpersonal group work 1" for comments and handouts particularly orientated to pre-group assessment.  It's usually time very well spent, orientating would-be participants to what interpersonal process groups are likely to involve.  This both speeds up the time it takes new group members to start engaging helpfully in group interactions, and reduces drop-out rates.  Participants who know roughly what the group is going to be like, why the experience is relevant to what they want to change in their lives, and how they can best engage with the group to gain most benefit, are likely to be participants who get most from the group experience.  Below I've listed various handouts that can be relevant in this orientation process.