2、The detailed characterictics of the groups：
①Interdependence
Group members depend on each other and fulfill each other.
②Common Goal
Team members have a common goal to achieve.
③Group Personality
Groups of members with different characteristics will also result in their own distinctive group personality, like conservative, intelligent, social etc.
④Commitment
Commitment is an individual ’s identity and trust in the goals and values of the organization, and the positive emotional experience it brings.
⑤Cohesiveness
Cohesiveness refers to the degree of solidarity and collaboration among group members to achieve group activity goals.
⑥Group Conflict
Group conflict is inevitable, but moderate conflict is conducive to the development of the group.
⑦Social Facilitation
Groups can promote the stimulation of personal potential and energy
⑧Gender Differences
Different gender structure of the group will produce different group decision-making actions and effects
⑨Group Size
Groups of from three to twenty-five people are generally called small groups, while larger than twenty-five are called large groups. ⑩Norms
Groups go through the stages of formation, conflict, and integration, which will form the norms in the group
3、Measures to make the group members get into a positive participation：
①OPEN TO EVALUATION.
Group discussion can lead to the best possible information and the best possible decision, but this will happen only if members open their comments to evaluation. At the same time, it will encourage the members to express their thoughts bravely.
② AVIOD BEING AGGRESSIVE,
Harmonious group atmosphere will also bring good group communication.
③HAVE SPECIFIC GOALS
A unified group goal is the key to an effective group.