Before revision: Usually, the way backchannel is used would be a person telling a story or explaining something to one or more individuals, involved in a conversation, who would respond to him with short verbal messages or non-verbal body language.
After revision: Usually, the way backchannel is used would be a person telling a story or explaining something to one or more individuals, involved in a conversation, who would respond to them with short verbal messages or non-verbal body language.