Visioning the future of our field: Challenges & opportunities
主講人： Professor Diane Sonnenwald
The landscape of society continues to undergo tremendous change. Social challenges are more complex than ever before, often crossing multiple geo-political boundaries, creating new socio-economic boundaries and involving new relationships and interdependencies among actors. Natural and human-made disasters continue to present multiple challenges linked to information access. Scientific instruments and sensors are producing new types and large volumes of digital data that require curation. Personal, cultural and organizational heritage digital data that allow for new ways of interacting with information and others, and new ways of understanding ourselves and our society continue to increase. These trends present challenges and opportunities for our field that place demands on our academic leadership. This talk discusses these challenges and demands.
Context-aware query suggestion
主講人： Professor Pu-Jen Cheng (鄭卜壬 教授)
Real queries are often short and ambiguous. Most existing search engines, therefore, provide query suggestion to users. Such suggested queries can help people explore different ways to formulate their query. For example, given "java" as an input, Google may suggest "java games" and "java coffee". To better understand users' search intents, one possible solution is to exploit so-called context information such as users' click-through data or preceding queries. If the users look for information about "android" before "java", it seems better to suggest "java games", instead of "java coffee".
This talk will start from the problem of how to model query dependency based on users' reformulation activities in context. Two models will be presented, which learn how users change preceding queries such as adding a term and deleting a term along query sessions. Then another problem of how to suggest possible completions of users' partial queries based on the context information will be addressed. We will demonstrate the feasibility of our algorithms on a real search engine log.
How information searching is related to work task outcome: Search effort degrades search output but improves task outcome
主講人： Professor Pertti Vakkari
We analyzed how effort in searching is associated with search output and task outcome. In a field study we examined how students' search effort for an assigned learning task was associated to precision and relative recall, and how this was associated to the quality of learning outcome.
The study subjects were 41 medical students writing essays for a class in medicine. Searching in Medline was part of their assignment. The data consists of students? search logs in Medline, their assessment of the usefulness of references retrieved, a questionnaire concerning the search process, and evaluation scores of the essays given by the teachers. Pearson correlation was calculated for answering the research questions. Finally, a path model for predicting task outcome was built.
We found out that effort in the search process degraded precision, but improved task outcome. There were two major mechanisms reducing precision, while enhancing task outcome. Effort in expanding MeSH terms within search sessions, and effort in assessing and exploring documents in the result list between the sessions degraded precision, but led to better task outcome. Thus, human effort compensated bad retrieval results on the way to good task outcome. Findings suggest that traditional effectiveness measures in information retrieval should be complemented with evaluation measures for search process and outcome.
In Sickness and in Health:Online Health Communication in A Socio-Cultural Perspective
主講人： Professor Ming-Hsin Phoebe Chiu (邱銘心 教授)
This presentation will explore online health information services and examine health communication research through analytic lenses of social and cultural perspectives. These two essential factors not only shape health information service provision, but also determine the information communication. Social factors are, but not limited to race, gender, age, household incomes, and accessibility. Some cultural factors are tolerance of ambiguity, privacy concerns, authority, and preference of communication styles. Three themes will be discussed: the social and cultural-based health information services design, a review of recent literature on online health communication through social and cultural perspectives, and trends in health information services design and health communication research. This presentation is prepared based on a series of related research, health information service audit, and literature review.