A. Astin, Student involvement: a developmental theory for higher education, Journal of College Student Personnel, vol.25, issue.4, pp.297-308, 1984.

S. Bødker, When second wave HCI meets third wave challenges, Proceedings of the 4th Nordic conference on Human-computer interaction changing roles, NordiCHI '06, pp.1-8, 2006.
DOI : 10.1145/1182475.1182476

H. Brynjarsdottir, Sustainably unpersuaded, Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems, CHI '12, pp.947-956
DOI : 10.1145/2207676.2208539

R. Comber and A. Thieme, Designing beyond habit: opening space for improved recycling and food waste behaviors through processes of persuasion, social influence and aversive affect, Personal and Ubiquitous Computing, vol.24, issue.3
DOI : 10.1007/s00779-012-0587-1

S. Consolvo, D. W. Mcdonald, and J. A. Landay, Theory-driven design strategies for technologies that support behavior change in everyday life, Proceedings of the 27th international conference on Human factors in computing systems, CHI 09, pp.405-414, 2009.
DOI : 10.1145/1518701.1518766

M. Csikszentmihalyi, Finding Flow: The Psychology Of Engagement With Everyday Life, Basic Books, 1998.

S. Deterding, From game design elements to gamefulness, Proceedings of the 15th International Academic MindTrek Conference on Envisioning Future Media Environments, MindTrek '11, pp.9-15, 2011.
DOI : 10.1145/2181037.2181040

M. Deutsch, G. , and H. G. , A study of normative and informational social influences upon individual judgment., The Journal of Abnormal and Social Psychology, vol.51, issue.3, pp.629-636, 1955.
DOI : 10.1037/h0046408

J. Dewey, How we think, 1997.
DOI : 10.1037/10903-000

C. Disalvo, P. Sengers, and H. Brynjarsdóttir, Mapping the landscape of sustainable HCI, Proceedings of the 28th international conference on Human factors in computing systems, CHI '10, pp.1975-1984
DOI : 10.1145/1753326.1753625

G. Doherty, D. Colye, and J. Sharry, Engagement with online mental health interventions, Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems, CHI '12, pp.1421-1430
DOI : 10.1145/2207676.2208602

URL : https://research-information.bris.ac.uk/ws/files/8415402/2001516.pdf

N. B. Ellison, C. Steinfield, and C. Lampe, The Benefits of Facebook ???Friends:??? Social Capital and College Students??? Use of Online Social Network Sites, Journal of Computer-Mediated Communication, vol.22, issue.3, pp.12-1143, 2007.
DOI : 10.1111/j.1083-6101.2007.00367.x

B. J. Fogg, A behavioral model for persuasive design, Proc. Persuasive, 2006.
DOI : 10.1145/1541948.1541999

B. J. Fogg, Persuasive technology, Ubiquity, vol.2002, issue.December, 2003.
DOI : 10.1145/764008.763957

D. Foster, Wattsup?, Proceedings of the 6th Nordic Conference on Human-Computer Interaction Extending Boundaries, NordiCHI '10, pp.178-187, 2010.
DOI : 10.1145/1868914.1868938

J. Fröhlich, Investigating a mobile tool for tracking and supporting green transportation habits, Proc. CHI, pp.1043-1052, 2009.

J. Fröhlich, L. Findlater, and J. Landay, The design of eco-feedback technology, Proceedings of the 28th international conference on Human factors in computing systems, CHI '10, 1999.
DOI : 10.1145/1753326.1753629

A. Gartland and P. Piasek, Weigh your waste, Proceedings of the 27th international conference extended abstracts on Human factors in computing systems, CHI EA '09, pp.2853-2858, 2009.
DOI : 10.1145/1520340.1520414

T. Hartmann and C. Klimmt, Gender and Computer Games: Exploring Females' Dislikes, Journal of Computer-Mediated Communication, vol.22, issue.1, pp.910-931, 2006.
DOI : 10.1080/136911899359556

T. Holmes, Eco-visualization, Proceedings of the 6th ACM SIGCHI conference on Creativity & cognition , C&C '07, pp.153-162
DOI : 10.1145/1254960.1254982

S. Jamison-powell, "I can't get no sleep", Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems, CHI '12, pp.1501-1510
DOI : 10.1145/2207676.2208612

D. S. Jianqiang, Farmer's tale, Proceedings of the 2011 annual conference on Human factors in computing systems, CHI '11, pp.581-584
DOI : 10.1145/1978942.1979024

B. Kirman, Improving social game engagement on facebook through enhanced socio-contextual information, Proceedings of the 28th international conference on Human factors in computing systems, CHI '10, pp.1753-1756, 2010.
DOI : 10.1145/1753326.1753589

URL : http://eprints.lincoln.ac.uk/2166/1/magpies_postprint.pdf

J. Lehmann, Models of User Engagement, Proc. UMAP 2012
DOI : 10.1007/978-3-642-31454-4_14

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.650.8467

I. Li, A. K. Dey, and J. A. Forlizzi, A stage-based model of personal informatics systems, Proceedings of the 28th international conference on Human factors in computing systems, CHI '10, pp.557-566
DOI : 10.1145/1753326.1753409

Y. Liu, T. Alexandrova, and T. Nakajima, Gamifying intelligent environments, Proceedings of the 2011 international ACM workshop on Ubiquitous meta user interfaces, Ubi-MUI '11, pp.7-12
DOI : 10.1145/2072652.2072655

J. C. Mankoff, D. Matthews, S. R. Fussell, and M. Johnson, Leveraging Social Networks To Motivate Individuals to Reduce their Ecological Footprints, 2007 40th Annual Hawaii International Conference on System Sciences (HICSS'07), pp.1-10, 2007.
DOI : 10.1109/HICSS.2007.325

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.456.1619

J. Mccarthy, P. Wright, and J. Wallace, The experience of enchantment in human ? computer interaction. Personal and Ubiquitous Computing, pp.369-378, 2006.

C. Peters, G. Castellano, and S. De-freitas, An exploration of user engagement in HCI, Proceedings of the International Workshop on Affective-Aware Virtual Agents and Social Robots, AFFINE '09, 2009.
DOI : 10.1145/1655260.1655269

M. Shiraishi, Using individual, social and economic persuasion techniques to reduce CO2 emissions in a family setting, Proc. Persuasive, 2009.

Y. Strengers, Designing eco-feedback systems for everyday life, Proceedings of the 2011 annual conference on Human factors in computing systems, CHI '11, pp.2135-2144, 2011.
DOI : 10.1145/1978942.1979252

A. Thieme and R. Comber, "We've bin watching you", Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems, CHI '12, pp.2337-2247
DOI : 10.1145/2207676.2208394

A. Thieme, Lovers' box: Designing for reflection within romantic relationships, International Journal of Human-Computer Studies, vol.69, issue.5, pp.283-297, 2011.
DOI : 10.1016/j.ijhcs.2010.12.006

J. Thom, D. Millen, and J. Dimicco, Removing gamification from an enterprise SNS, Proceedings of the ACM 2012 conference on Computer Supported Cooperative Work, CSCW '12, pp.1067-1070
DOI : 10.1145/2145204.2145362

B. Zhong, M. Hardin, and T. Sun, Less effortful thinking leads to more social networking? The associations between the use of social network sites and personality traits, Computers in Human Behavior, vol.27, issue.3, pp.1265-1271, 2011.
DOI : 10.1016/j.chb.2011.01.008