This experiment study focused on the effect of the engagement and the enticement toward online impulse buying by following the Latent State Trait theory (LST). This study also applies impulsiveness as the personality trait and the interplay between state (the engagement, the enticement) and trait (impulsiveness) toward the urge to buy impulsively. The experiment in this study was conducted by using (2 (high/low degree of the engagement) x 2(high/low degree of enticement)) x2(high/low impulsiveness) full factorial design. As the result of this study show that impulsiveness, the engagement, the enticement have direct effect on urge to buy impulsively. In addition, this study also found the interplay between impulsiveness, the engagement and the enticement on urge to buy impulsively. Our finding contribute to the social network sites designer and e-retailer to know how to design the storefront page by use the interactive functions on Facebook page .Also , this research provide the result to understand the important factors which can induce customer to do impulse buying in social network site context.

REFERENCES
Aaker, J. L. (1997). Dimensions of brand personality. Journal of marketing research, 347-356.
Abdul-Ghani, E., Hyde, K. F., & Marshall, R. (2011). Emic and etic interpretations of engagement with a consumer-to-consumer online auction site. Journal of Business Research, 64(10), 1060-1066.
Adelaar, T., et al. (2003). Effects of media formats on emotions and impulse buying intent. Journal of Information Technology, 18(4), 247-266.
Agarwal, R., & Karahanna, E. (2000). Time flies when you're having fun: Cognitive absorption and beliefs about information technology usage. MIS quarterly, 665-694.
Allport, G. W., & Vernon, P. E. (1933). Studies in expressive movement. New York , USA: Macmillan Co Studies.
Amos, C., Holmes, G. R., & Keneson, W. C. (2014). A meta-analysis of consumer impulse buying. Journal of Retailing and Consumer Services, 21(2), 86-97.
Beatty, S. E., & Ferrell, M. E. (1998). Impulse buying: Modeling its precursors. Journal of Retailing, 74(2), 169-191.
Bellman, S., Lohse, G. L., & Jonhson, E. J. (1999). Predictors of online buying behavior. Communications of the ACM, 42(12), 32-38.
Calder, B. J., Malthouse, E. C., & Schaedel, U. (2009). An experimental study of the relationship between online engagement and advertising effectiveness. Journal of Interactive Marketing, 23(4), 321-331.
Chang, H.-J., Eckman, M., & Yan, R.-N. (2011). Application of the Stimulus-Organism-Response model to the retail environment: The role of hedonic motivation in impulse buying behavior. The International Review of Retail, Distribution and Consumer Research, 21(3), 233-249.
Chaplin, W. F., John, O. P., & Goldberg, L. R. (1988). Conceptions of states and traits: Dimensional attributes with ideals as prototypes. Journal of Personality and Social Psychology, 54(4), 541.
Chen, K., & Yen, D. C. (2004). Improving the quality of online presence through interactivity. Information & Management, 42(1), 217-226.
Coley, A., & Burgess, B. (2003). Gender differences in cognitive and affective impulse buying. Journal of Fashion Marketing and Management, 7(3), 282-295.
Coyle, J. R., & Thorson, E. (2001). The effects of progressive levels of interactivity and vividness in web marketing sites. Journal of advertising, 30(3), 65-77.
Dholakia, U. M. (2000). Temptation and resistance: An integrated model of consumption impulse formation and enactment. Psychology & Marketing, 17(11), 955-982.
Donthu, N., & Garcia, A. (1999). The internet shopper. Journal of Advertising Research, 39(3), 52-58.
Dudycha, G. J. (1936). An objective study of punctuality in relation to personality and achievement. US: Columbia University.
Ellison, N. B. (2007). Social network sites: Definition, history, and scholarship. Journal of Computer‐Mediated Communication, 13(1), 210-230.
Eroglu, S. A., Machleit, K. A., & Davis, L. M. (2001). Atmospheric qualities of online retailing: A conceptual model and implications. Journal of Business Research, 54(2), 177-184.
Eysenck, H. J. (1983). Cicero and the state-trait theory of anxiety: Another case of delayed recognition. American Psychologist, 38(1), 114-115.
Floh, A., & Madlberger, M. (2013). The role of atmospheric cues in online impulse-buying behavior. Electronic Commerce Research and Applications, 12(6), 425-439.
Grabner-Kräuter, S. (2009). Web 2.0 social networks: The role of trust. Journal of Business Ethics, 90(4), 505-522.
Greenwald, A. G., & Leavitt, C. (1984). Audience involvement in advertising: Four levels. Journal of Consumer Research, 11(1), 581-592.
Ha, L., & James, E. L. (1998). Interactivity reexamined: A baseline analysis of early business web sites. Journal of Broadcasting & Electronic Media, 42(4), 457-474.
Hair, J., Black, W., Babin, B., & Anderson, R. (2010). Multivariate data analysis (Seventh Edition). NJ, USA: Prentice Hall.
Harmancioglu, N., Finney, R. Z., & Joseph, M. (2009). Impulse purchases of new products: An empirical analysis. Journal of Product and Brand Management, 18(1), 27-37.
Harris, L., & Dennis, C. (2011). Engaging customers on Facebook: Challenges for e‐retailers. Journal of Consumer Behaviour, 10(6), 338-346.
Hartshorne, H., & May, M. (1928). Studies in the Nature of Character: Vol. I, Studies in Deceit; Vol. II, Studies in Self-Control; Vol. III, Studies in the Organization of Character. New York , USA: Macmillan
Hertzog, C., & Nesselroade, J. R. (1987). Beyond autoregressive models: Some implications of the trait-state distinction for the structural modeling of developmental change. Child Development, 58(1), 93-109.
Hoffman, D. L., & Novak, T. P. (1996). Marketing in hypermedia computer-mediated environments: Conceptual foundations. The Journal of Marketing, 50-68.
Hsu, H.-Y., & Tsou, H. T. (2011). The effect of website quality on consumer emotional states and repurchases intention. African Journal of Business Management, 5(15), 6194-6199.
Jiang, Z., & Benbasat, I. (2007). The effects of presentation formats and task complexity on online consumers' product understanding. MIS Quarterly, 31(3), 475-500.
Jiang, Z., Chan, J., Tan, B. C., & Chua, W. S. (2010). Effects of interactivity on website involvement and purchase intention. Journal of the Association for Information Systems, 11(1), 34-59.
Kacen, J. J., Hess, J. D., & Walker, D. (2012). Spontaneous selection: The influence of product and retailing factors on consumer impulse purchases. Journal of Retailing and Consumer Services, 19(6), 578-588.
Kahn, W. A. (1990). Psychological conditions of personal engagement and disengagement at work. Academy of Management Journal, 33(4), 692-724.
Kang, J.-Y. M., & Johnson, K. K. (2015). F-Commerce platform for apparel online social shopping: Testing a Mowen’s 3M model. International Journal of Information Management, 35(6), 691-701.
Khaslavsky, J., & Shedroff, N. (1999). Understanding the seductive experience. Communications of the ACM, 42(5), 45-49.
Kim, J.-H., Kim, M., & Lennon, S. J. (2009). Effects of web site atmospherics on consumer responses: Music and product presentation. Direct Marketing: An International Journal, 3(1), 4-19.
Klein, L. R. (2000). Your homepage-The Joys of Interactivity-Leo Robert Klein provides the tools to animate your web sites and make them feature rich. Library Journal, 2(0), 20-23.
Kreitler, H., & Kreitler, S. (1972). Psychology of the Arts: Duke University Press.
Kumar, S., & Mishra, B. (2012). What drives impulse buying? International Journal of Management Sciences, 1(2), 114-123.
Lea, B.-R., Yu, W.-R., Maguluru, N., & Nichols, M. (2006). Enhancing business networks using social network based virtual communities. Industrial Management & Data Systems, 106(1), 121-138.
Li, H., Daugherty, T., & Biocca, F. (2002). Impact of 3-D advertising on product knowledge, brand attitude, and purchase intention: The mediating role of presence. Journal of Advertising, 31(3), 43-57.
Li, T., Berens, G., & de Maertelaere, M. (2013). Corporate Twitter channels: The impact of engagement and informedness on corporate reputation. International Journal of Electronic Commerce, 18(2), 97-126.
Liu, Y., Li, H., & Hu, F. (2013a). Website attributes in urging online impulse purchase: An empirical investigation on consumer perceptions. Decision Support Systems, 55(3), 829-837.
Liu, Y., Li, H., & Hu, F. (2013b). Websites attributes in urging online impulse purchase: An empirical Investigation on consumer perceptions. Decision Support Systems, 55(3), 829-837.
Lowry, P. B., Romano, N. C., Jenkins, J. L., & Guthrie, R. W. (2009). The CMC interactivity model: How interactivity enhances communication quality and process satisfaction in lean-media groups. Journal of Management Information Systems, 26(1), 155-196.
McEachern, M. G., & Warnaby, G. (2008). Exploring the relationship between consumer knowledge and purchase behaviour of value‐based labels. International Journal of Consumer Studies, 32(5), 414-426.
Menon, S., & Soman, D. (2002). Managing the power of curiosity for effective web advertising strategies. Journal of Advertising, 31(3), 1-14.
Miller, E. G., & Kahn, B. E. (2005). Shades of meaning: the effect of color and flavor names on consumer choice. Journal of Consumer Research, 32(1), 86-92.
Mischel, W. (1973). Toward a cognitive social learning reconceptualization of personality. Psychological Review, 80(0), 252-258.
Mitchell, A. A. (1979). Involvement: A potentially important mediator of consumer behavior. Advances in Consumer Research, 6(1), 191-196.
Newcomb, T. (1929). The consistency of certain extrovert-introvert behavior patterns in fifty-one problem boys. The Teachers College Record, 31(3), 263-265.
Ning Shen, K., & Khalifa, M. (2012). System design effects on online impulse buying. Internet Research, 22(4), 396-425.
Novak, T. P., Hoffman, D. L., & Yung, Y.-F. (2000). Measuring the customer experience in online environments: A structural modeling approach. Marketing Science, 19(1), 22-42.
O'Brien, H. L., & Toms, E. G. (2008). What is user engagement? A conceptual framework for defining user engagement with technology. Journal of the American Society for Information Science and Technology, 59(6), 938-955.
Parboteeah, D. V., Valacich, J. S., & Wells, J. D. (2009). The influence of website characteristics on a consumer's urge to buy impulsively. Information Systems Research, 20(1), 60-78.
Peracchio, L. A., & Meyers-Levy, J. (1994). How ambiguous cropped objects in ad photos can affect product evaluations. Journal of Consumer Research, 21(1), 190-204.
Phau, I., & Lo, C. (2004). Profiling fashion innovators: A study of self-concept, impulse buying and internet purchase intent. Journal of Fashion Marketing and Management, 8(4), 399-411.
Piron, F. (1991). Defining impulse purchasing. Advances in Consumer Research 18(1), 509-514.
Rook, D. W. (1987). The buying impulse. Journal of Consumer Research, 14(2), 189-199.
Rook, D. W., & Fisher, R. J. (1995). Normative influences on impulsive buying behavior. Journal of Consumer Research, 22(3), 305-313.
Sharma, P., Sivakumaran, B., & Marshall, R. (2010). Impulse buying and variety seeking: A trait-correlates perspective. Journal of Business Research, 63(3), 276-283.
Song, J. H., & Zinkhan, G. M. (2008). Determinants of perceived web site interactivity. Journal of Marketing, 72(2), 99-113.
Stern, H. (1962). The significance of impulse buying today. Journal of Marketing, 26(2), 59-62.
Steyer, R., Schmitt, M., & Eid, M. (1999). Latent state–trait theory and research in personality and individual differences. European Journal of Personality, 13(5), 389-408.
Suh, K.-S., & Lee, Y. E. (2005). The effects of virtual reality on consumer learning: an empirical investigation. Mis Quarterly, 673-697.
Sun, T., & Wu, G. (2011). Trait predictors of online impulsive buying tendency: A hierarchical approach. Journal of Marketing Theory and Practice, 19(3), 337-346.
Tinne, W. S. (2010). Impulse Purchasing: A Literature Overview. ASA University Review, 4(2), 65-73.
Van Noort, G., Voorveld, H. A., & van Reijmersdal, E. A. (2012). Interactivity in brand web sites: Cognitive, affective, and behavioral responses explained by consumers' online flow experience. Journal of Interactive Marketing, 26(4), 223-234.
Verhagen, T., & van Dolen, W. (2011). The influence of online store beliefs on consumer online impulse buying: A model and empirical application. Information & Management, 48(8), 320-327.
Vohs, K. D., & Faber, R. J. (2007). Spent resources: Self-regulatory resource availability affects impulse buying. Journal of Consumer Research, 33(4), 537-547.
Vohs, K. D., & Faber, R. J. (2007). Spent resources: Self-regulatory resource availability affects impulse buying. Journal of Consumer Research, 33(4), 534-547.
Wells, J. D., Parboteeah, V., & Valacich, J. S. (2011). Online impulse buying: Understanding the interplay between consumer impulsiveness and website quality. Journal of the Association for Information Systems, 12(1), 32-56.
Yi, C., Jiang, Z., & Benbasat, I. (2015). Enticing and engaging consumers via online product presentations: The effects of restricted interaction design. Journal of Management Information Systems, 31(4), 213-242.
Youn, S., & Faber, R. J. (2000). Impulse buying: Its relation to personality traits and cues. Advances in Consumer Research, 27(0), 179-185.
Youn, S., & R.J., F. (2000). Impulse buying: Its relation to personality traits and cues. Advances in Consumer Research, 27(1), 179-185.
Zhang, X., Prybutok, V. R., & Koh, C. E. (2006). The role of impulsiveness in a TAM-based online purchasing behavior model. Information Resources Management Journal, 19(2), 54-68.
Zhang, X., Prybutok, V. R., & Koh, C. E. (2008). The Role of impulsiveness on a TAM-based online purchasing behavior Model. US: Hershey.
Zhang, X., Prybutok, V. R., & Strutton, D. (2007). Modeling influences on impulse purchasing behaviors during online marketing transactions. Journal of Marketing Theory and Practice, 15(1), 79-89.