Glaser,  B.  G.,  &  Strauss,  A.  L.  (1967).  The discovery of 
grounded theory: Strategies for qualitative research. 
Aldine Publishing. 
Gray,  C.,  Gibbons,  R.,  Larouche,  R.,  Sandseter,  E., 
Bienenstock, A., Brussoni, M., Chabot, G., Herrington, 
S.,  Janssen,  I.,  Pickett,  W.,  Power,  M.,  Stanger,  N., 
Sampson,  M.,  Tremblay,  M.,  Gray,  C.,  Gibbons,  R.,  
Larouche, R., Sandseter, E. B. H., Bienenstock, A., … 
Tremblay, M. S. (2015). What Is the Relationship be-
tween Outdoor Time and Physical Activity, Sedentary 
Behaviour,  and  Physical  Fitness  in  Children?  A  
Systematic Review. International Journal of Environ-
mental Research and Public Health,  12(6). 
https://doi.org/10.3390/ijerph120606455 
Greenberg, S., & Buxton, B. (2008). Usability Evaluation 
Considered Harmful (Some of the Time). Proceedings 
of the SIGCHI Conference on Human Factors in  
Computing Systems, 111–120. https://doi.org/10.1145/ 
1357054.1357074 
Hidi, S., & Renninger, K. A. (2006). The Four-Phase Model 
of  Interest  Development.  Educational Psychologist, 
41(2),  111–127.  https://doi.org/10.1207/ 
s15326985ep4102_4 
Holt, N. L., Lee, H., Millar, C. A., & Spence, J. C. (2015). 
‘Eyes on where children play’: A retrospective study of 
active free play. Children’s Geographies, 13(1), 73–88. 
https://doi.org/10.1080/14733285.2013.828449 
Jake-Schoffman,  D.  E.,  Silfee,  V.  J.,  Waring,  M.  E.,  
Boudreaux,  E.  D.,  Sadasivam,  R.  S.,  Mullen,  S.  P., 
Carey, J. L., Hayes, R. B., Ding, E. Y., Bennett, G. G., 
&  Pagoto,  S.  L.  (2017).  Methods  for  Evaluating  the 
Content, Usability, and Efficacy of Commercial Mobile 
Health  Apps.  JMIR MHealth and UHealth,  5(12). 
https://doi.org/10.2196/mhealth.8758 
Jordan, B., & Henderson, A. (1995). Interaction Analysis: 
Foundations and Practice. The Journal of the Learning 
Sciences, 4(1), 39–103. 
Kamarainen, A. M., Metcalf, S., Grotzer, T., Browne, A., 
Mazzuca,  D.,  Tutwiler,  M.  S.,  &  Dede,  C.  (2013).  
EcoMOBILE:  Integrating  augmented  reality  and  
probeware  with  environmental  education  field  trips. 
Computers & Education,  68,  545–556. 
https://doi.org/10.1016/j.compedu.2013.02.018 
Kawas, S., Chase, S., Yip, J., Lawler, J., & Katie, D. (2019). 
Sparking  Interest:  A  Design  Framework  for  Mobile 
Technologies to Promote Children’s Interest in Nature. 
International Journal of Child-Computer Interaction. 
Kimbro, R. T., Brooks-Gunn, J., & McLanahan, S. (2011). 
Young children in urban areas: Links among neighbor-
hood  characteristics,  weight  status,  outdoor  play,  and 
television watching. Social Science & Medicine, 72(5), 
668–676.  https://doi.org/10.1016/j.socscimed.2010.12. 
015 
King, C.,  Dordel,  J., Krzic,  M.,  &  Simard, S.  W.  (2014). 
Integrating a Mobile-Based Gaming Application into a 
Postsecondary  Forest  Ecology  Course.  Natural  
Sciences Education.  https://doi.org/10.4195/nse2014. 
02.0004 
Klasnja,  P.,  Consolvo,  S.,  &  Pratt,  W.  (2011).  How  to  
Evaluate Technologies for Health Behavior Change in 
HCI Research. Proceedings of the SIGCHI Conference 
on Human Factors in Computing Systems, 3063–3072. 
https://doi.org/10.1145/1978942.1979396 
Klemmer, C. D., Waliczek, T. M., & Zajicek, J. M. (2005). 
Growing Minds: The Effect of a School Gardening Pro-
gram  on  the  Science  Achievement  of  Elementary 
Students. HortTechnology, 15(3), 448–452. 
Krapp, A. (2002). Structural and dynamic aspects of inter-
est  development:  Theoretical  considerations  from  an 
ontogenetic  perspective.  Learning and Instruction, 
12(4),  383–409.  https://doi.org/10.1016/S0959-
4752(01)00011-1 
Krapp, A. (2003). Interest and human development: An ed-
ucational  psychological  perspective.  In  Development 
and motivation (pp. 57–84). British Psychological So-
ciety. 
Kuhn, A., Cahill, C., Quintana, C., & Schmoll, S. (2011). 
Using Tags to Encourage Reflection and Annotation on 
Data  During  Nomadic  Inquiry.  Proceedings of the 
SIGCHI Conference on Human Factors in Computing 
Systems,  667–670.  https://doi.org/10.1145/1978942. 
1979038 
Lo, W. T., Delen, I., Cahill, C., Kuhn, A., Schmoll, S., & 
Quintana,  C.  (2012).  A  New  Type  of  Learning  
Experience in Nomadic Inquiry: Use of Zydeco in the 
Science  Center.  2012 IEEE Seventh International  
Conference on Wireless, Mobile and Ubiquitous Tech-
nology in Education (WMUTE).  https://doi.org/10. 
1109/WMUTE.2012.16 
Lohr, V. I., & Pearson-Mims, C. H. (2004). The Relative 
Influence  of  Childhood  Activities  and  Demographics 
On  Adult  Appreciation  For  The  Role  Of  Trees  In  
Human  Well-Being.  Acta Horticulturae,  253–259. 
https://doi.org/10.17660/ActaHortic.2004.639.33 
Louv,  R.  (2008).  Last Child in the Woods: Saving Our  
Children from Nature-deficit Disorder.  Algonquin 
Books. 
Maxwell,  J.  A.  (1996).  Qualitative research design: An  
interactive approach. Sage Publications. 
Moller,  A.  C.,  Merchant,  G.,  Conroy,  D.  E.,  West,  R.,  
Hekler,  E.  B.,  Kugler,  K.  C.,  &  Michie,  S.  (2017).  
Applying and advancing behavior change theories and 
techniques in the context of a digital health revolution: 
Proposals  for  more  effectively  realizing  untapped  
potential.  Journal of Behavioral  
Medicine.https://doi.org/10.1007/s10865-016-9818-7 
Nayebi, F., Desharnais, J., & Abran, A. (2012). The state of 
the art of mobile application usability evaluation. 2012 
25th IEEE Canadian Conference on Electrical and 
Computer Engineering (CCECE),  1–4. 
https://doi.org/10.1109/CCECE.2012.6334930 
O’Brien,  L.,  &  Murray,  R.  (2007).  Forest  School  and  its  
impacts  on  young  children:  Case  studies  in  Britain.  
Urban Forestry & Urban Greening,  6(4),  249–265. 
https://doi.org/10.1016/j.ufug.2007.03.006 
Olson,  J.  S.,  &  Kellogg,  W.  (2014).  Ways of knowing in 
HCI. Springer. 
Rogers, Y., Price, S., Fitzpatrick, G., Fleck, R., Harris, E., 
Smith,  H.,  Randell,  C.,  Muller,  H.,  O’Malley,  C.,