In linguistics, the term backchannel is used to describe the short words or sounds a listener makes during a conversation to acknowledge what the speaker is saying and make known that he is still paying attention. For example, in English this would include:
- Mm-hmm
- Yeah
- Wow!
- Definitely
- Really?
- Ahh
- Ok
What are the most common listener responses like this in Spanish? What situations is each used in (for example, agreement, acknowledgement, surprise)?