No abstract

The online social media such as Facebook, Twitter and YouTube has been used extensively during disaster and emergency situation. Despite the advantages offered by these services on supplying information in vague situation by citizen, we raised the issue of spreading misinformation on Twitter by using retweets. Accordingly, in this study, we conduct a user survey (n = 133) to investigate what is the user's action towards spread message in Twitter, and why user decide to perform retweet on the spread message. As the result of the factor analyses, we extracted 3 factors on user's action towards spread message which are: 1) Desire to spread the retweet messages as it is considered important, 2) Mark the retweet messages as favorite using Twitter "Favorite" function, and 3) Search for further information about the content of the retweet messages. Then, we further analyze why user decides to perform retweet. The results reveal that user has desire to spread the message which they think is important and the reason why they retweet it is because of the need to retweet, interesting tweet content and the tweet user. The results presented in this paper provide an understanding on user behavior of information diffusion, with the aim to reduce the spread of misinformation using Twitter during emergency situation.

Abstract

The Tohoku Region Pacific Coast Earthquake and its Tsunami caused serious damage to the Pacific coast in northeastern Japan. We suggest it is important to share the serious situation in the disaster area to gain public understanding and support. In this paper, we propose a Reconstruction Watcher which lets people share reconstruction progress visually to gain public understanding and to support the disaster area. To find practical issues and confirm the feasibility of the Reconstruction Watcher, we went to the disaster area and tried to show the serious situation to the public. This paper reports our challenges and findings.

Twitter was used to a great extent by government, media and individuals to obtain and exchange information real time during emergency. In ambiguous situation where information is crucial, some misinformation may creep in and spread around by retweet. This paper discusses on Twitter issues in emergency situation. A survey was conducted to investigate user's decision making after one read retweet messages in Twitter. As the result of the factor analyses, we grouped the 28 question items into three categories: 1) Desire to spread the retweet messages as it is considered important, 2) Mark the retweet messages as favorite using Twitter "Favorite" function, and 3) Search for further information about the content of the retweet messages.

No abstract

No abstract

No abstract