Final answer:
Self-help groups can vary in their level of formal structure, with some having defined roles and responsibilities while others are more informal. Members do not typically require formal training to join or participate in self-help groups.
Step-by-step explanation:
The level of formal structure in self-help groups can vary. Some self-help groups may have a formal structure with defined roles and responsibilities, while others may be more informal. For example, Alcoholics Anonymous (AA) is a self-help group that follows a formal structure with 12 steps and guidelines for members to follow. On the other hand, support groups for specific health conditions may be less structured and have more informal interactions among members.
Regarding formal training, members of self-help groups generally do not need formal training to join or participate. The purpose of self-help groups is to provide support and help individuals with similar experiences or challenges. Therefore, the focus is on peer support, sharing personal experiences, and learning from each other.