C. White, L. Plotnick, and J. Kushma, An online social network for emergency management, International Journal of Emergency Management, vol.6, issue.3/4, pp.369-382, 2009.
DOI : 10.1504/IJEM.2009.031572

B. D. Peary, R. Shaw, and Y. Takeuchi, Utilization of Social Media in the East Japan Earthquake and Tsunami and its Effectiveness, Journal of Natural Disaster Science, vol.34, issue.1, pp.3-18, 2012.
DOI : 10.2328/jnds.34.3

R. Chen and Y. Sakamoto, Perspective Matters: Sharing of Crisis Information in Social Media, 2013 46th Hawaii International Conference on System Sciences, pp.2033-2041, 2013.
DOI : 10.1109/HICSS.2013.447

R. Chen and Y. Sakamoto, Feelings and Perspective matter: Sharing of Crisis Information in Social Media, Proc. of the 47 th Hawaii International Conference on System Sciences (HICCS-47, pp.1958-1967, 2014.

Y. Tanaka, Y. Sakamoto, and T. Matsuka, Toward a Social-Technological System that Inactivates False Rumors through the Critical Thinking of Crowds, Proc. of the 46 th Hawaii International Conference on System Sciences (HICCS-46, pp.649-658, 2013.

Y. Tanaka, Y. Sakamoto, and T. Matsuka, Transmission of Rumor and Criticism in Twitter after the Great Japan Earthquake, Proc. of the 34 th Annual Conference of the Cognitive Science Society, pp.2387-2392, 2012.

Y. Tanaka, Y. Sakamoto, and H. Honda, The Impact of Posting URLs in Disaster-Related Tweets on Rumor Spreading Behavior, 2014 47th Hawaii International Conference on System Sciences, pp.520-529, 2014.
DOI : 10.1109/HICSS.2014.72

G. W. Allport and L. Postman, The Psychology of Rumor, 1947.

S. R. Hiltz, The Domain of Emergency Management Information Advances in Management Information Systems, Information Systems for Emergency Management, vol.16, 2010.

S. Raue, L. Azzopardi, and C. W. Johnson, #trapped!, Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval, SIGIR '13, pp.1073-1076, 2013.
DOI : 10.1145/2484028.2484184

A. Gupta, H. Lamba, and P. Kumaraguru, Faking Sandy, Proceedings of the 22nd International Conference on World Wide Web, WWW '13 Companion, pp.729-736, 2013.
DOI : 10.1145/2487788.2488033

C. Hagar, Crisis informatics: Perspectives of trust?Is social media a mixed blessing, Student Research Journal, vol.2, issue.2

J. Jung, Social media use and goals after the Great East Japan Earthquake, First Monday, vol.17, issue.8, 2012.
DOI : 10.5210/fm.v17i8.4071

A. Acar and Y. Muraki, Twitter for crisis communication: lessons learned from Japan's tsunami disaster, International Journal of Web Based Communities, vol.7, issue.3, pp.392-402, 2011.
DOI : 10.1504/IJWBC.2011.041206

A. T. Chatfield, H. J. Scholl, and U. Brajawidagda, #Sandy Tweets: Citizens' Co-Production of Time-Critical Information during an Unfolding Catastrophe, 2014 47th Hawaii International Conference on System Sciences, pp.1947-1957, 2014.
DOI : 10.1109/HICSS.2014.247

Y. Murayama, Y. Saito, and D. Nishioka, Trust Issues in Disaster Communications, 2013 46th Hawaii International Conference on System Sciences, pp.335-342, 2013.
DOI : 10.1109/HICSS.2013.576

I. Twitter, About Twitter, Inc. https://about.twitter.com/company, Accessed, vol.14, 2014.

D. Boyd, S. Golder, and G. Lotan, Tweet, Tweet, Retweet: Conversational Aspects of Retweeting on Twitter, 2010 43rd Hawaii International Conference on System Sciences, pp.1-10, 2010.
DOI : 10.1109/HICSS.2010.412

R. Tinati, L. Carr, and W. Hall, Identifying communicator roles in twitter, Proceedings of the 21st international conference companion on World Wide Web, WWW '12 Companion, pp.1161-1168, 2012.
DOI : 10.1145/2187980.2188256

D. Zarella, The Science of Retweets, danzarrella.com. Accessed, vol.29, 2009.

M. Mukai, Research on a Model for Decision Making in Retweet which caused Spreading of False Rumor in Emergencies, Master Dissertation, 2012.

N. Difonzo and P. Bordia, Rumor Psychology: social and organizational approaches, 2007.
DOI : 10.1037/11503-000

D. Bertram, Likert Scales, 2007.

G. Brown, An Introduction to Confirmatory Factor Analysis (CFA) and Structural Equation Modeling (SEM)