Keyword generation by native speaker is quick and useful in conversation between native and non-native speaker

Real-time keywords potentially demonstrate positive effects when they are provided in cross-cultural communication. Previously real-time keywords generated by a speaker during talking were investigated, and it was found it contributes to build mutual understanding and knowledge. However the use of keywords was not clarified in respect of when and how was typed in real-time communication. In this paper we analyze the data sets of multiple media files and typed materials collected through the experiment, and investigate the use of keyword in a collaborative dialogue. Consequently it was found that speaking was earlier and typing was 2.6 seconds behind of relevant speech, which met the requirement that real-time transcript was beneficial when its shown within 5 seconds. Besides, noun phrases that were typed as keywords were categorized referring to utterance. It was consequently found that 55% of all keywords were expansion and replacement of NS message when speakers got explicit interlocutors acceptance. Lastly conversation analysis was conducted to articulate how keywords are expressed in a conversation. The data showed that speakers uttered multiple episodes when speakers utilized keywords, but briefly uttered in standard manner without keywords.