“…Later, scholars extended backchannel responses to include sentence completions, requests for clarification, brief statements, and non-verbal responses (Duncan & Niederehe, 1974;Duncan & Fiske, 1977). To distinguish backchannel responses, two conditions must to be met: (a) they do not disturb the primary speaker's speakership, and (b) they do not intend to take over the floor of the current speaker (Clancy, Thompson, Suzuki & Tao, 1996). The two main functions of backchannel responses are ''continuers'' and ''assessments'' (Goodwin, 1986;Schegloff, 1982).…”