隨著資訊科技的進步，點對點網路(Peer- to-Peer Networks)傳輸的使用情況已經漸漸普及。然而，由於點對點網路軟體的使用日趨盛行，許多使用者用來下載有版權的音樂或電影，因此點對點網路軟體經常伴隨著一些爭議性的話題，例如:智慧財產權。事實上，每個使用者在點對點網路裡都擁有高度自主權去決定要將資訊分享給誰、分享什麼樣的資訊、什麼時候分享資訊，我們不禁思考除了有版權爭議的多媒體檔外，知識是否可以在點對點網路裡被有效地分享呢?使用者的意向會決定使用者是否產生知識分享的行為，而使用者態度、主觀規範、使用者控制能力將會影響使用者的意向。本研究採用計畫行為理論來試著解釋點對點網路裡的使用者知識分享行為。由於缺乏現有點對點網路實際使用資料，本研究採用實驗法的方式在一個點對點網路的平台：SOKUL， 利用合作式學習活動來進行實驗以驗證根據計劃行為理論所提出的研究假說。
經由實驗結束後的47份問卷調查與在SOKUL平台資料庫所記錄的使用者真正活動行為，實驗結果顯示主觀規範顯著地影響使用者知識分享的意向。此外，實驗結果也顯示使用者行為和使用者意向有正面的顯著關係，符合計畫行為理論所提出的論點。進而，根據個案訪談，本研究討論導致實驗結果的因素。最後，提出相關後續修正與繼續探討的研究方向。

Many peer-to-peer (P2P) networks have been popularly used for file sharing. However, P2P applications have also been notorious for sharing copyrighted digital goods besides for the free riding problem. Inherent in the characteristics of P2P networks that a peer acts both as a content provider and a consumer, a peer is granted autonomy to decide what, with whom, and when to share. Is it possible that a user can effectively share knowledge with others via a p2p network? A user’s attitude, normative, and control believes may influence a user’s intention to share knowledge through P2P networks. This study adopts the Theory of Planned Behavior (TPB) to attempt to explain the knowledge sharing behaviors on a P2P network. Due to the lack of empirical data, this study conducts experiments on a P2P network platform, SOKUL to test the hypotheses derived from TPB in collaborative learning activities.
Through the survey of 47 subjects and transaction log data of SOKUL, experimental results indicate that subjective norm significantly influences peers’ intention for knowledge sharing under a collaborative learning circumstance, and behavior of knowledge sharing is indeed positively related to intention which matches with what TPB model claims. Based on these results, implications of the findings and future research directions are also discussed in this study.
Keywords: Knowledge sharing; collaborative learning; peer-to-peer networks, Theory of Planned Behavior

Adar, E., & Huberman, B. A. (2000). Free riding on Gnutella. First Monday, 15(10).
Ajzen, I. (2002). Constructing a TPB questionnaire: conceptual and methodological considerations.
Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179-211.
Ajzen, I., & Fishbein, M. (1980). Understanding Attitudes and Predicting Social Behavior. Englewood Cliffs, NJ: Prentice Hall.
Armitage, C. J., & Conner, M. (2001). The theory of planned behavior. British Journal of Social Psychology, 40(4), 471-499.
Beerel, A. C. (1987). Expert Systems: Strategic Implications and Applications. Wiley, Halstead Press.
Bock, G. W., Zmud, R. W., Lee, J. N., & Kim Y. G.. (2005). Behavioral intention formation in knowledge sharing: examining the roles of extrinsic motivators, social-psychological forces, and organizational climate. MIS Quarterly, 29(1), 87-111.
Bollen, K. A. (1990). Overall fit in covariance structure models: Two types of sample size effects. Psychological Bulletin. 107(2): 256-259.
Bransford, J. D., Brown, A., & Cocking, R. (1999). How People Learn: Mind, Brain, Experience and School. Washington, DC: National Academy Press.
Brooking, A. (1996). Intellectual Capital. A Thomson Company, London.
Davenport, T. H., & Prusak, L. (1998). Working knowledge. Harvard Business School Press.
Davis, F. D. (1989). Perceived usefulness, perceived ease of use, and user acceptance of information technology. MIS Quarterly, 13(3), 319-340.
Dretske, F. (1981). Knowledge and the flow of information. Cambridge, MA: MIT Press.
Dreyfus, D., & Iyer, B. (2005). Knowledge sharing and value flow in the software industry: searching the patent citation network. Proceedings of the 38th Hawaii International Conference on System Science.
Dillenbourg, P. (1999). What do you mean by 'Collaborative Learning'?, Collaborative-learning: Cognitive and Computational Approaches, 1-19.
Evaristo, J. R., & Desouza, K. C. (2004). Managing knowledge in distributed projects. Communications of The ACM, 47(4), 87-91.
Fishbein, M., & Ajzen, I. (1975). Belief, attitude, intention, and behavior: an introduction to theory and research. MA: Addison-Wesley.
Fernie, S., Green, S. D., Weller, S. J., & Newcombe, R. (2003). Knowledge sharing: context, confusion and controversy. International Journal of Project Management, 21, 177–187.
Gibbert, M., & Krusak, H. (2000). Practice exchange in a best practice marketplace. In: Davenport, T. & Probst, G., Knowledge Management Case Book, Publicis MCD/John Wiley & Sons, Erlangen and Munich/Germany, 68 – 84.
Glaser, R., & Silver, E. (1994). Assessment, testing, and instruction: Retrospect and prospect. Review of Research in Education, 20, 393 – 419, Washington, D.C.: American Educational Research Association.
Hair, J. F., Anderson, R. E., Tatham, R. L., & Black, W. C. (1998), Multivariate Data Analysis, Prentice Hall.
Harmon, P., & Sawyer, B. (1990). Creating Expert Systems for business and industry. John Wiley & Sons.
Hendriks, P. (1999). Why share knowledge? The influence of ICT on motivation for knowledge sharing. Knowledge and Process Management, 6(2), 91-100.
Huber, G. P. (1991). Organizational learning: the contribution process and the literatures. Organization Science, 2, 88-115.
Hung, C. C., & Kuo, C. C. (2003). The Transformation and Search of Semi-Structured Knowledge in Organizations. Journal of Knowledge Management, 7(4), 106-123.
Kogut, B., & Zander, U. (1992). Knowledge of the firm, combinative capabilities, and the replication of technology. Organization Science, 3, 383-397.
Kogut, B., & Zander, U. (1996). What firms do? Coordination, identity, and learning. Organization Science, 7, 502-518.
Kankanhalli, A., Tan, B. C. Y., & Wei, K. K. (2005). Contributing knowledge to electronic knowledge repositories: an empirical investigation. MIS Quarterly, 29(1), 113-143.
Lee, J. (2002). Peer-to-Peer file sharing systems: What matters to the end. MIT Center for Coordination Science, (217), Cambridge, MA.
Lee, J. (2003). An end-user perspective on file sharing systems. Communications of the ACM, 46(2), 49.
Lethin, R. (2003). Technical and social components of peer-to-peer computing. Communications of the ACM, 46(2), 30.
Lin, S. S., Hung, S. L., Lin, H. H., & Lin, F. R. (2001). Investigating the Knowledge-sharing Behavior in a Professional Virtual Community. International Conference on Electronic Business, 19-21.
Machlup, F. (1983). Semantic quirks in studies of information. The Study of Information, New York: John Wiley.
Mathieson, K. (1991). Predicting user intentions: Comparing the technology acceptance model with the theory of planned behavior. Information Systems Research, 2(3), 173-191.
Miller. D., & Shamsie, J. (1996). The resource-based view of the firm in two environments; the hollywood film studios from 1936 to 1965. Academy of Management Journal, 519-543.
Nee, E. (2001). Fortune Magazine, Nov. 16-17.
Nelson, K. M., & Cooprider, J. G.. (1996). The contribution of shared knowledge to IS group performance. MIS Quarterly, 409-432.
Nonaka, I. (1994). A dynamic theory of organizational knowledge creation. Organization Science, 5(1), 14-37.
Nonaka, I., Konno, N. (1998). The concept of Ba’: Building foundation for Knowledge Creation. California Management Review, 40(3).
Nully, J. (1978), Psychometric Theory, 2nd Edition, New York: McGraw-Hill.
Oram, A. (2001). Peer-to-peer: Harnessing the power of disruptive technologies. O'Reilly &Associates, Cambridge, MA.
Palincsar, A. S., & Brown, A. L. (1984). Reciprocal teaching of comprehension – fostering and monitoring activities. Cognition and Instruction, 1(2), 117-175.
Peace, A. G., Galletta, D. F., & Thong, J. Y. L. (2003). Software piracy in the workplace: A model and empirical test. Journal of Management Information Systems, 20(1), 153.
Polanyi, M. (1966). The Tacit Dimension. New York: Doubleday.
Ryu, S., Ho, S. H., & Han, I. (2003). Knowledge sharing of physicians in hospitals. Expert Systems with Applications, 25(1), 113-122.
Sambamurthy, V., & Subramani, M. (2005). Special issue on information technologies and knowledge management. MIS Quarterly, 29(1), 1-7.
Senge, P. M. (1998). Sharing knowledge. Executive Excellence, 15(6), 11-12.
Takeishi, A. (2002). Knowledge partitioning in the inter-firm division of labor: The case of automotive product development. Organization Science, 13(3), 321-338.
Teece, D. J., Pisano, G., & Shuen, A. (1997). Dynamic capabilities and strategic management. Strategic Management Journal, 18(7), 509-533.
Tran, H., Hitchens, M., Varadharajan, V., & Watters, P. (2005). A trust based access control framework for P2P file-sharing systems. The 38th Hawaii International Conference on System Sciences.
Tuthill, G. S., & Levy, S. T. (1991). Knowledge based systems: A manager’s perspective. TAB Book, New York.
Watabe, K., Hamalainen, M., & Whinston, A. B. (1995). An internet based collaborative distance learning system: CODILESS. Computers & Education, 24(3), 141-155.
Wielinga, B. J., Schreiber, A. Th., & Breuker, J. A. (1992). KADS: A modelling approach to knowledge engineering. Knowledge Acquisition, 4(1), 5-53.