Teams have magic influence

I remembered a man who was an active researcher but he could not speak well in public and express his own ideas in groups. When he came to our team and started to be active in a buddy group on a job, he still had the problem. It was in the group that he practised to talk, and little by little, he dared to mention eloquently his viewpoints. This helped him to improve in talking while he contributed to the team as much as he could.  The buddy group was a very effective structure to help him to improve his communication skills.
This effect occurs in groups with a  less members because in their the communication, act and react can happen much more  in compare with big teams with more members. In small team members have a more time to do and practice and have trial and error.