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Hauff, C. (author), Thomee, Bart (author), Trevisiol, Michele (author)This paper provides a description of the MediaEval 2013 Placing Task. The primary task of location estimation asks participants to place images on the world map, that is, to automatically estimate the latitude/longitude coordinates at which a photograph was taken. The newly introduced secondary task of placeability prediction asks participants...conference paper 2013
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Yang, J. (author), Hauff, C. (author), Bozzon, A. (author), Houben, G.J.P.M. (author)Collaborative Question Answering (cQA) platforms are a very popular repository of crowd-generated knowledge. By formulating questions, users express needs that other members of the cQA community try to collaboratively satisfy. Poorly formulated questions are less likely to receive useful responses, thus hindering the overall knowledge generation...conference paper 2014
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Prasetyo, N.D. (author), Hauff, C. (author), Nguyen, Dong (author), Hiemstra, Djoerd (author), Broek, Tijs van den (author)Health campaigns that aim to raise awareness and subsequently raise funds for research and treatment are commonplace. While many local campaigns exist, very few attract the attention of a global audience. One of those global campaigns is Movember, an annual campaign during the month of November, that is directed at men’s health with special foci...conference paper 2015
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Choi, J. (author), Hauff, C. (author), Van Laere, O. (author), Thomee, B. (author)The sixth edition of the Placing Task at MediaEval introduces two new sub-tasks: (1) locale-based placing, which emphasizes the need to move away from an evaluation purely based on latitude and longitude towards an entity-centered evaluation, and (2) mobility-based placing, which addresses predicting missing locations within a sequence of...conference paper 2015
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Bao, Yingying (author), Chen, G. (author), Hauff, C. (author)Massive Open Online Courses (MOOCs) are a promising form of online education. However, the occurrence of academic dishonesty has been threatening MOOC certificates’ effectiveness as a serious tool for recruiters and employers. Recently, a large-scale study on the log traces from more than one hundred MOOCs created by Harvard and MIT has...conference paper 2017
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Chen, G. (author), Davis, D.J. (author), Krause, Markus (author), Hauff, C. (author), Houben, G.J.P.M. (author)Massive Open Online Courses (MOOCs) aim to educate the world, especially learners from developing countries. While MOOCs are certainly available to the masses, they are not yet fully accessible. Although all course content is just clicks<br/>away, deeply engaging with a MOOC requires a substantial time commitment, which frequently becomes a...conference paper 2017
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Davis, D.J. (author), Jivet, I. (author), Kizilcec, René F. (author), Chen, G. (author), Hauff, C. (author), Houben, G.J.P.M. (author)Social comparison theory asserts that we establish our social and personal worth by comparing ourselves to others. In in-person learning environments, social comparison offers students critical feedback on how to behave and be successful. By contrast, online learning environments afford fewer social cues to facilitate social comparison. Can...conference paper 2017
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Scaling Effective Learning Strategies: Retrieval Practice and Long-Term Knowledge Retention in MOOCsDavis, D.J. (author), Kizilcec, René F. (author), Hauff, C. (author), Houben, G.J.P.M. (author)Large-scale online learning environments such as MOOCs provide an opportunity to evaluate the efficacy of learning strategies in an informal learning context with a diverse learner population. Here, we evaluate the extent to which retrieval practice — recognized as one of the most effective learning strategies — facilitates long-term knowledge...journal article 2018
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Chen, G. (author), Hauff, C. (author), Houben, G.J.P.M. (author)Knowledge tracing serves as a keystone in delivering personalized education. However, few works attempted to model students’ knowledge state in the setting of Second Language Acquisition. The Duolingo Shared Task on Second Language Acquisition Modeling (Settles et al., 2018) provides students’ trace data that we extensively analyze and engineer...conference paper 2018
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Davis, D.J. (author), Kizilcec, René F. (author), Hauff, C. (author), Houben, G.J.P.M. (author)Retrieval practice has been established in the learning sciences as one of the most effective strategies to facilitate robust learning in traditional classroom contexts. The cognitive theory underpinning the "testing effect" states that actively recalling information is more effective than passively revisiting materials for storing information...conference paper 2018
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Davis, D.J. (author), Chen, G. (author), Hauff, C. (author), Houben, G.J.P.M. (author)Taking advantage of the vast history of theoretical and empirical findings in the learning literature we have inherited, this research offers a synthesis of prior findings in the domain of empirically evaluated active learning strategies in digital learning environments. The primary concern of the present study is to evaluate these findings with...journal article 2018
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Chen, G. (author), Yang, J. (author), Hauff, C. (author), Houben, G.J.P.M. (author)We present LearningQ, a challenging educational question generation dataset containing over 230K document-question pairs. It includes 7K instructor-designed questions assessing knowledge concepts being taught and 223K learner-generated questions seeking in-depth understanding of the taught concepts. We show that, compared to existing datasets...conference paper 2018
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Davis, D.J. (author), Seaton, Daniel (author), Hauff, C. (author), Houben, G.J.P.M. (author)This paper applies theory and methodology from the learning design literature to large-scale learning environments through quantitative modeling of the structure and design of Massive Open Online Courses. For two institutions of higher education, we automate the task of encoding pedagogy and learning design principles for 177 courses (which...conference paper 2018
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Rikarno Putra, Sindunuraga (author), Grashoff, Kilian (author), Moraes Gomes, F. (author), Hauff, C. (author)Collaborative search is an active area of research in the IR community (and has been for many years)—despite this, there is a lack of open-source tools available to jump-start research in collaborative search. It is common for collaborative search researchers to implement their own tooling, leading to unnecessary duplicate engineering efforts....conference paper 2018
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Sindunuraga Rikarno Putra, Sindu (author), Moraes Gomes, F. (author), Hauff, C. (author)Collaborative search has been an active area of research within the IR community for many years. While for "single-user'' research a variety of up-to-date open-source search systems exist, few "multi-user'' search tools are open-source and even fewer are being maintained. In this paper, we present SearchX, an open-source collaborative search...conference paper 2018
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Chen, G. (author), Davis, D.J. (author), Krause, Markus (author), Aivaloglou, E.A. (author), Hauff, C. (author), Houben, G.J.P.M. (author)Massive Open Online Courses (MOOCs) aim to educate the world. More often than not, however, MOOCs fall short of this goal — a majority of learners are already highly educated (with a Bachelor degree or more) and come from specific parts of the (developed) world. Learners from developing countries without a higher degree are underrepresented,...journal article 2018
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Robal, T. (author), Zhao, Y. (author), Lofi, C. (author), Hauff, C. (author)Massive Open Online Courses (MOOCs) have become an attractive opportunity for people around the world to gain knowledge and skills. Despite the initial enthusiasm of the first wave of MOOCs and the subsequent research efforts, MOOCs today suffer from retention issues: many MOOC learners start but do not finish. A main culprit is the lack of...conference paper 2018
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Davis, D.J. (author), Hauff, C. (author), Houben, G.J.P.M. (author)Crowdsourcing has emerged as an effective method of scaling-up tasks previously reserved for a small set of experts. Accordingly, researchers in the large-scale online learning space have begun to employ crowdworkers to conduct research about large-scale, open online learning. We here report results from a crowdsourcing study (N=135) to evaluate...journal article 2018
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Davis, D.J. (author), Triglianos, V. (author), Hauff, C. (author), Houben, G.J.P.M. (author)Past research in large-scale learning environments has found one of the most inhibiting factors to learners’ success to be their inability to effectively self-regulate their learning efforts. In traditional small-scale learning environments, personalized feedback (on progress, content, behavior, etc.) has been found to be an effective solution...conference paper 2018
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Zhao, Y. (author), Robal, T. (author), Lofi, C. (author), Hauff, C. (author)The use of mobile technology has become a part of our daily<br/>lives and enabled us to perform tasks that once were possible only on<br/>stationary computers on-the-go anywhere and at any time. This shift<br/>has also affected the way we learn. The use of mobile devices on-the-go<br/>requires users to multitask and divide attention between...conference paper 2018