Backchannels

Backchannels occur in conversation when a speaker is talking and a listener interjects. These responses are called backchannel responses and can be verbal, non-verbal, or both.

Backchannel responses usually don't convey important information. They are primarily used to signify the listener's interest, understanding, or Agreement with what the speaker is saying.

What are Backchannels?

Fig. 1 - 'Yeah' can be used as a backchannel in a conversation.

What are backchannels used for?

The term backchannel itself hints that there is more than one channel operating during a conversation. Actually, there are two channels of communication - the primary channel and the secondary channel; this is the backchannel. The primary channel of communication is the speech of the person speaking at any given moment, and the secondary channel of communication is the actions of the listener.

The backchannel provides 'continuers', such as 'mm hmm', 'uh huh' and 'yes'. These reveal the listener's interest and understanding. Therefore, the primary and the secondary channel define the different roles of the participants in the conversation - the speaker uses the primary channel while the listener uses the backchannel.

What are the three types of backchannel?

Backchannels are categorized into three types:

1. Non-lexical backchannels
2. Phrasal backchannels
3. Substantive backchannels

Non-lexical backchannels

Non-lexical backchannels can be used to express interest, Agreement, surprise, or confusion. Because they are short, the listener can interject the conversation while the current speaker is having a turn, without causing any disruption ('uh huh' for example).

Phrasal backchannels

A phrasal backchannel is a way for the listener to show their engagement with what the speaker is saying through the use of simple words and short phrases.

Similar to non-lexical backchannels, phrasal backchannels can express different things, from surprise to support. They are usually a direct response to a previous utterance.

Consider this example:

Here, the phrasal backchannel ('wow') shows amazement and is a direct response to A's (the speaker's) description of the dress.

Additionally, like non-lexical backchannels, phrasal backchannels are also short enough so that, when using them, the listener doesn't spoil the flow of the conversation.

Substantive backchannels

Similar to phrasal backchannels, substantive backchannels also require a specific context - they are ways in which the listener directly reacts to the speaker:

B (the listener) uses a substantive backchannel to show their surprise.

Substantive backchannels usually only address certain parts of the conversation rather than the conversation as a whole. Consequently, they can occur in different parts of the conversation - beginning, middle or end.

Generic backchannels vs Specific backchannels

The three types of backchannels - Non-lexical, Phrasal and Substantial - are further categorized into two uses. Some backchannel responses are more generic, while others depend on a specific context.

Generic backchannels

Generic backchannels are responses that we use in day-to-day conversation. Non-lexical backchannels such as 'mm-hmm' and 'uh huh' are generic backchannels that the listener uses as a way of showing they agree with the speaker, or to indicate that they are paying attention.

After B (the listener) interjects, A (the speaker) continues with their turn and provides new information.

Specific backchannels

Specific backchannels are used to emphasise the listener's reactions to what the speaker is saying. Phrasal backchannels and substantive backchannels such as 'wow', 'yeah' and 'oh come on!' are specific backchannels because their use depends on the specific circumstances of the conversation. When the listener uses a specific backchannel, the speaker doesn't simply continue by adding new information, they reply to the listener's response instead.

The highlighted text shows the substantive backchannels that B (the listener) uses. All of them are specific to the context of this particular conversation. What A (the speaker) says after B (the listener) uses backchannels depends on what the backchannel responses are. Thus, the speaker provides additional information specific to the listener's response.