S. Aloteibi and M. Sanderson, Analyzing geographic query reformulation: An exploratory study, Journal of the Association for Information Science and Technology, vol.52, issue.12, pp.13-24, 2014.
DOI : 10.1002/asi.1157

A. Aula, User study on older adults' use of the Web and search engines. Universal Access in the Information Society, pp.67-81, 2005.

D. J. Bell and I. Ruthven, Searcher???s Assessments of Task Complexity for Web Searching, European Conference on Information Retrieval, pp.57-71, 2004.
DOI : 10.1007/978-3-540-24752-4_5

D. M. Blei, A. Y. Ng, and M. I. Jordan, Latent dirichlet allocation, Journal of Machine Learning Research, vol.3, pp.993-1022, 2003.

P. Borlund and P. Ingwersen, The development of a method for the evaluation of interactive information retrieval systems, Journal of Documentation, vol.1994, issue.3, pp.225-250, 1997.
DOI : 10.1145/215206.215355

K. Byström, Information and information sources in tasks of varying complexity, Journal of the American Society for Information Science and Technology, vol.29, issue.6, pp.581-591, 2002.
DOI : 10.1016/0306-4573(93)90100-R

D. J. Campbell, Task complexity: A review and analysis, Academy of Management Review, vol.13, issue.1, pp.40-52, 1988.
DOI : 10.2307/258353

A. Chevalier, A. Dommes, and J. C. Marquié, Strategy and accuracy during information search on the Web: Effects of age and complexity of the search questions, Computers in Human Behavior, vol.53, pp.305-315, 2015.
DOI : 10.1016/j.chb.2015.07.017

J. Chin, E. Anderson, C. L. Chin, and W. T. Fu, Age differences in information search, Proceedings of the Human Factors and Ergonomic Society, pp.85-89, 2015.
DOI : 10.1145/1352782.1352785

J. Dinet, E. Brangier, G. Michel, R. Vivian, S. Battisti et al., Older People as Information Seekers: Exploratory Studies About Their Needs and Strategies, International Conference on Universal Access in Human-Computer Interaction, pp.877-886, 2007.
DOI : 10.1007/978-3-540-73279-2_98

A. Dommes, A. Chevalier, and S. Lia, The role of cognitive flexibility and vocabulary abilities of younger and older users in searching for information on the web, Applied Cognitive Psychology, vol.11, issue.5, pp.5-717, 2011.
DOI : 10.1177/073428299301100104
URL : https://hal.archives-ouvertes.fr/hal-00908259

P. W. Foltz, W. Kintsch, and T. K. Landauer, The measurement of textual coherence with latent semantic analysis, Discourse Processes, pp.285-307, 1998.
DOI : 10.1080/01638539809545030

W. T. Fu and P. Pirolli, SNIF-ACT: A cognitive model of user navigation on the World Wide Web, Human?Computer Interaction, vol.22, issue.4, pp.355-412, 2007.
DOI : 10.21236/ADA462156

D. Ghosh, Effects of Topic Familiarity on Query Reformulation Strategies, Proceedings of the 2016 ACM on Conference on Human Information Interaction and Retrieval, CHIIR '16, pp.261-264, 2016.
DOI : 10.3115/v1/D14-1162

J. Gwizdka and I. Spence, What Can Searching Behavior Tell Us About the Difficulty of Information Tasks? A Study of Web Navigation, Proceedings of the American Society for Information Science and Technology, pp.1-22, 2006.
DOI : 10.1007/978-3-540-30111-0_7

J. L. Horn, The Theory of Fluid and Crystallized Intelligence in Relation to Concepts of Cognitive Psychology and Aging in Adulthood, Aging and Cognitive Processes, pp.237-278, 2012.
DOI : 10.1007/978-1-4684-4178-9_14

J. L. Horn and R. B. Cattell, Age differences in fluid and crystallized intelligence, Acta Psychologica, vol.26, pp.107-129, 1967.
DOI : 10.1016/0001-6918(67)90011-X

R. Hu, K. Lu, and S. Joo, Effects of topic familiarity and search skills on query reformulation behavior, Proceedings of the American Society for Information Science and Technology, pp.1-9, 2013.
DOI : 10.1145/2110363.2110434

J. Huang and E. N. Efthimiadis, Analyzing and evaluating query reformulation strategies in web search logs, Proceeding of the 18th ACM conference on Information and knowledge management, CIKM '09, pp.77-86, 2009.
DOI : 10.1145/1645953.1645966
URL : http://jeffhuang.com/cikm09_final.pdf

B. J. Jansen, D. L. Booth, and A. Spink, Patterns of query reformulation during Web searching, Journal of the American Society for Information Science and Technology, vol.60, issue.3, pp.1358-1371, 2009.
DOI : 10.1109/WI.2007.4427162

B. J. Jansen, A. Spink, and B. Narayan, Query Modifications Patterns During Web Searching, Fourth International Conference on Information Technology (ITNG'07), pp.439-444, 2007.
DOI : 10.1109/ITNG.2007.164

J. Jiang and C. Ni, What Affects Word Changes in Query Reformulation During a Taskbased Search Session?, Proceedings of the 2016 ACM on Conference on Human Information Interaction and Retrieval, pp.111-120, 2016.

I. Juvina and H. Van-oostendorp, Modeling Semantic and Structural Knowledge in Web Navigation, Discourse Processes, pp.4-5, 2008.
DOI : 10.1016/0191-8869(96)00032-3

S. Karanam and H. Van-oostendorp, Age-related Differences in the Content of Search Queries when Reformulating, Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems, CHI '16, pp.5720-5730, 2016.
DOI : 10.1007/s10209-006-0054-8

S. Karanam, H. Van-oostendorp, and W. T. Fu, Performance of computational cognitive models of web-navigation on real websites, Journal of Information Science, vol.43, issue.4, pp.94-113, 2016.
DOI : 10.1002/acp.1743

S. Karanam, H. Van-oostendorp, M. Sanchiz, A. Chevalier, J. Chin et al., Modeling and predicting information search behavior, Proceedings of the 5th International Conference on Web Intelligence, Mining and Semantics, WIMS '15, 2015.
DOI : 10.1007/s10209-006-0054-8

J. Kim, Task as a predictable indicator for information seeking behavior on the Web, 2006.

K. Kinley, D. Tjondronegoro, H. Partridge, and S. Edwards, Human-computer interaction, Proceedings of the 24th Australian Computer-Human Interaction Conference on, OzCHI '12, pp.299-307, 2012.
DOI : 10.1145/2414536.2414586

T. K. Landauer, D. S. Mcnamara, S. Dennis, and W. Kintsch, Handbook of Latent Semantic Analysis, 2007.

Y. Li, Exploring the relationships between work task and search task in information search, Journal of the American Society for Information Science and Technology, vol.57, issue.1, pp.275-291, 2009.
DOI : 10.1002/asi.20977

C. Liu, J. Gwizdka, J. Liu, T. Xu, and N. J. Belkin, Analysis and evaluation of query reformulations in different task types, Proceedings of the American Society for Information Science and Technology, pp.1-9, 2010.
DOI : 10.1002/asi.10367

K. Lund and C. Burgess, Producing high-dimensional semantic spaces from lexical co-occurrence, Behavior Research Methods, Instruments, & Computers, vol.19, issue.2, pp.203-208, 1996.
DOI : 10.1007/BF01074363
URL : https://link.springer.com/content/pdf/10.3758%2FBF03204766.pdf

D. Mellor, L. Firth, and K. Moore, Can the Internet Improve the Well-being of the Elderly?, Ageing International, vol.6, issue.4, pp.25-42, 2008.
DOI : 10.2466/pr0.1994.75.3f.1507

K. Millis, J. Magliano, K. Wiemer-hastings, S. Todaro, and D. S. Mcnamara, Assessing and improving comprehension with latent semantic analysis. Handbook of latent semantic analysis, pp.207-225, 2007.
DOI : 10.4324/9780203936399.ch11

S. Monchaux, F. Amadieu, A. Chevalier, and C. Mariné, Query strategies during information searching: Effects of prior domain knowledge and complexity of the information problems to be solved, Information Processing & Management, vol.51, issue.5, pp.51-557, 2015.
DOI : 10.1016/j.ipm.2015.05.004

P. Melguizo, M. C. Vidya, U. , C. Oostendorp, and H. , Seeking information online: the influence of menu type, navigation path complexity and spatial ability on information gathering tasks, Behaviour & Information Technology, issue.1, pp.31-59, 2012.

T. L. Queen, T. M. Hess, G. E. Ennis, K. Dowd, and D. Grühn, Information search and decision making: Effects of age and complexity on strategy use., Psychology and Aging, vol.27, issue.4, p.817, 2012.
DOI : 10.1037/a0028744

J. C. Raven and . J. Court, Raven's progressive matrices and vocabulary scales, 1998.

S. Y. Rieh, Analysis of multiple query reformulations on the web: The interactive information retrieval context. Information Processing & Management, pp.751-768, 2006.

S. J. Shute and P. J. Smith, Knowledge-based search tactics, Information Processing & Management, vol.29, issue.1, pp.29-45, 1993.
DOI : 10.1016/0306-4573(93)90021-5

K. Slegers, M. P. Van-boxtel, and J. Jolles, Computer use in older adults: Determinants and the relationship with cognitive change over a 6year episode, Computers in Human Behavior, vol.28, issue.1, pp.1-10, 2012.
DOI : 10.1016/j.chb.2011.08.003

M. Sloan, H. Yang, and J. Wang, A term-based methodology for query reformulation understanding, Information Retrieval Journal, vol.45, issue.2, pp.145-165, 2015.
DOI : 10.1145/1242572.1242576
URL : http://arxiv.org/pdf/1601.04615

E. Strauss, E. M. Sherman, and O. Spreen, A compendium of neuropsychological tests: Administration, norms, and commentary, 2006.

J. Teevan, E. Adar, R. Jones, and M. A. Potts, Information re-retrieval, Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval, SIGIR '07, pp.151-158, 2007.
DOI : 10.1145/1277741.1277770

P. D. Turney, Mining the Web for Synonyms: PMI-IR versus LSA on TOEFL, European Conference on Machine Learning, pp.491-502, 2001.
DOI : 10.1007/3-540-44795-4_42

P. Vakkari, Task-based information searching, Annual Review of Information Science and Technology, vol.48, issue.6, pp.413-464, 2003.
DOI : 10.1002/(SICI)1097-4571(198607)37:4<234::AID-ASI9>3.0.CO;2-A

H. Van-oostendorp, R. Madrid, and M. C. Melguizo, The Effect of Menu Type and Task Complexity on Information Retrieval Performance, The Ergonomics Open Journal, vol.2, issue.1, pp.64-71, 2009.
DOI : 10.2174/1875934300902010064

J. J. Wang and A. S. Kaufman, Changes in Fluid and Crystallized Intelligence Across the 20- to 90-Year Age Range on the K-Bit, Journal of Psychoeducational Assessment, vol.8, issue.1, pp.29-37, 1993.
DOI : 10.1177/073428299000800303

B. Wildemuth, L. Freund, G. Toms, and E. , Untangling search task complexity and difficulty in the context of interactive information retrieval studies, Journal of Documentation, vol.70, issue.6, pp.1118-1140, 2014.
DOI : 10.1016/j.ipm.2011.02.007

M. B. Wolfe, M. E. Schreiner, B. Rehder, D. Laham, P. W. Foltz et al., Learning from text: Matching readers and texts by latent semantic analysis, Discourse Processes, pp.309-336, 1998.
DOI : 10.1207/s1532690xci1401_2
URL : http://www.knowledge-technologies.com/papers/dp2.wolfe.ps

E. Wood, D. De-pasquale, J. L. Mueller, K. Archer, L. Zivcakova et al., Exploration of the relative contributions of domain knowledge and search expertise for conducting internet searches. The Reference Librarian, pp.182-204, 2016.

R. J. Youmans, B. Bellows, C. A. Gonzalez, B. Sarbone, and I. J. Figueroa, Designing for the Wisdom of Elders: Age Related Differences in Online Search Strategies, International Conference on Universal Access in Human-Computer Interaction, pp.240-249, 2013.
DOI : 10.1007/978-3-642-39191-0_27