Voice chat generate more repair moves

Jespon, K. (2005). Conservations--and negotiated interaction--in text and voice chat rooms. http://llt.msu.edu/vol9num3/jepson/

When we discover there is something wrong when chatting with other people, what would people mostly do? In Kevin Jepson’s experiment, the members were divided to take two kinds of chat room: text chat and voice chat. And the results found that voice chat would generate more repair moves.
Both text chat room and voice chat room are the online tools that enable people to chat with strangers. In other words, the participants would not know the background of those people in the chat room. Here is the question that because of the reasons that the participants are not familiar to each other, the participants would reconstruct the inner code between their conversations. It is quite different when we talk to someone that is totally a stranger to us than talking to a friend. The conversations between friends would not generate more repair moves than the conversations between strangers. There may be some mistakes but we could still understand the meanings the speakers want to convey because the interlocutors and the speakers got the consensus of the code in a certain degree. But as to the strangers, the speakers would spend more time to confirm the meanings.
In voice chat, the speakers would hear the sounds of each other, which would increase the number of repair moves. The voice chat would not take the record during the process, unlike the text chat, the words would show on the screen and the speakers could go back to check the sentences again. And there may be some problems of pronunciation.
The key point is that the speakers are faceless so that people would not dare to make sure what the exactly meaning is. And due to the aspect of technique, the equipment would play a key role that affect the result of repair moves.