Pernilla Qvarfordt | Linköping University (original) (raw)

Papers by Pernilla Qvarfordt

Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval - SIGIR '13, 2013

Proceedings of the 37th international ACM SIGIR conference on Research & development in information retrieval - SIGIR '14, 2014

ABSTRACT People often use more than one query when searching for information. They revisit search... more ABSTRACT People often use more than one query when searching for information. They revisit search results to re-find information and build an understanding of their search need through iterative explorations of query formulation. These tasks are not well-supported by search interfaces and web browsers. We designed and built SearchPanel, a Chrome browser extension that supports people in their ongoing information seeking. This extension combines document and process metadata into an interactive representation of the retrieved documents that can be used for sense-making, navigation, and re-finding documents. In a real-world deployment spanning over two months, results show that SearchPanel appears to have been primarily used for complex information needs, in search sessions with long durations and high numbers of queries. When process metadata was present in the UI, searchers in explorative search sessions submitted more and longer queries and interacted more with the SERP. These results indicate that the process metadata features in SearchPanel seem to be of particular importance for exploratory search.

Proceedings of the 2010 Symposium on Eye-Tracking Research & Applications - ETRA '10, 2010

In certain applications such as radiology and imagery analysis, it is important to minimize error... more In certain applications such as radiology and imagery analysis, it is important to minimize errors. In this paper we evaluate a structured inspection method that uses eye tracking information as a feedback mechanism to the image inspector. Our two-phase method starts with a free viewing phase during which gaze data is collected. During the next phase, we either segment the image, mask previously seen areas of the image, or combine the two techniques, and repeat the search. We compare the different methods proposed for the second search phase by evaluating the inspection method using true positive and false negative rates, and subjective workload. Results show that gaze-blocked configurations reduced the subjective workload, and that gaze-blocking without segmentation showed the largest increase in true positive identifications and the largest decrease in false negative identifications of previously unseen objects.

Computer Supported Cooperative Work, 2009

The Usable Smart Environment project (USE) aims at designing easy-to-use, highly functional next-... more The Usable Smart Environment project (USE) aims at designing easy-to-use, highly functional next-generation conference rooms. Our first design prototype focuses on creating a "no wizards" room for an American executive; that is, a room the executive could walk into and use by himself, without help from a technologist. A key idea in the USE framework is that customization is one of the best ways to create a smooth user experience. Since the system needs to fit both with the personal leadership style of the executive and the corporation's meeting culture, we began the design process by exploring the work flow in and around meetings attended by the executive.

In order to provoke a debate about the use of new technology, the Snatcher Catcher, an intrusive ... more In order to provoke a debate about the use of new technology, the Snatcher Catcher, an intrusive interactive refrigerator that keeps record of the items in it, was created. In this paper we present the fridge, and how we used it in a provocative installation. The results showed that the audience was provoked, and that few people wanted to have the fridge in their surroundings.

We have developed an interactive video search system that allows the searcher to rapidly assess q... more We have developed an interactive video search system that allows the searcher to rapidly assess query results and easily pivot off those results to form new queries. The system is intended to maximize the use of the discriminative power of the human searcher. The typical video search scenario we consider has a single searcher with the ability to search with text and content-based queries. In this paper, we evaluate a new collaborative modification of our search system. Using our system, two or more users with a common information need search together, simultaneously. The collaborative system provides tools, user interfaces and, most importantly, algorithmically-mediated retrieval to focus, enhance and augment the team's search and communication activities. In our evaluations, algorithmic mediation improved the collaborative performance of both retrieval (allowing a team of searchers to find relevant information more efficiently and effectively), and exploration (allowing the searchers to find relevant information that cannot be found while working individually). We present analysis and conclusions from comparative evaluations of the search system.

In this paper we present a solution to the problem of visualising large amount of hi- erarchical ... more In this paper we present a solution to the problem of visualising large amount of hi- erarchical information structures on small computer screens. Our solution has been implemented as a prototype for mobile use on a hand-held computer using Microsoft Pocket PC with a screen size of 240x320 pixels. The prototype uses the same in- formation as service engineers use

Design of information systems where spatial and temporalinformation is merged and can be accessed... more Design of information systems where spatial and temporalinformation is merged and can be accessed using variousmodalities requires careful examination on how to combinethe communication modalities to achieve efficient interaction.In this paper we present ongoing work on designing amultimodal interface with timetable information for localbuses where the same database information can be accessedby different user categories with various information needs.The prototype

In this paper we present an architecture for multi-modaldialogue systems. It is illustrated from ... more In this paper we present an architecture for multi-modaldialogue systems. It is illustrated from our development ofa multi-modal information system for local bus timetableinformation. The system is based on a natural languageinterface for typed interaction that is enhanced to handlealso multi-modal interaction. The multi-modal userinterface was designed based on empirical investigationsand some results from these investigations are presented.We also show

IFIP Conference on Human-Computer Interaction, 2003

Using speech input to augment the remote control can be an alternative interaction technique for ... more Using speech input to augment the remote control can be an alternative interaction technique for interactive television. However, little is known about how to design such a system that is suitable for the home environment. In this paper we explore possible error resolution strategies in the case of speech recognition errors in a TV-setting. From previous research two techniques have

Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval - SIGIR '13, 2013

ABSTRACT Exploratory search is a complex, iterative information seeking activity that involves ru... more ABSTRACT Exploratory search is a complex, iterative information seeking activity that involves running multiple queries and finding and examining many documents. We designed a query preview control that visualizes the distribution of newly-retrieved and re-retrieved documents prior to running the query. When evaluating the preview control with a control condition, we found effects on both people's information seeking behavior and improved retrieval performance. People spent more time formulating a query and were more likely to explore search results more deeply, retrieved a more diverse set of documents, and found more different relevant documents when using the preview.

Proceedings of the 37th international ACM SIGIR conference on Research & development in information retrieval - SIGIR '14, 2014

ABSTRACT People often use more than one query when searching for information. They revisit search... more ABSTRACT People often use more than one query when searching for information. They revisit search results to re-find information and build an understanding of their search need through iterative explorations of query formulation. These tasks are not well-supported by search interfaces and web browsers. We designed and built SearchPanel, a Chrome browser extension that supports people in their ongoing information seeking. This extension combines document and process metadata into an interactive representation of the retrieved documents that can be used for sense-making, navigation, and re-finding documents. In a real-world deployment spanning over two months, results show that SearchPanel appears to have been primarily used for complex information needs, in search sessions with long durations and high numbers of queries. When process metadata was present in the UI, searchers in explorative search sessions submitted more and longer queries and interacted more with the SERP. These results indicate that the process metadata features in SearchPanel seem to be of particular importance for exploratory search.

Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '08, 2008

We describe a new approach to information retrieval: algorithmic mediation for intentional, synch... more We describe a new approach to information retrieval: algorithmic mediation for intentional, synchronous collaborative exploratory search. Using our system, two or more users with a common information need search together, simultaneously. The collaborative system provides tools, user interfaces and, most importantly, algorithmically-mediated retrieval to focus, enhance and augment the team's search and communication activities. Collaborative search outperformed post hoc merging of similarly instrumented single user runs. Algorithmic mediation improved both collaborative search (allowing a team of searchers to find relevant information more efficiently and effectively), and exploratory search (allowing the searchers to find relevant information that cannot be found while working individually).

Proceedings of the 2010 Symposium on Eye-Tracking Research & Applications - ETRA '10, 2010

In certain applications such as radiology and imagery analysis, it is important to minimize error... more In certain applications such as radiology and imagery analysis, it is important to minimize errors. In this paper we evaluate a structured inspection method that uses eye tracking information as a feedback mechanism to the image inspector. Our two-phase method starts with a free viewing phase during which gaze data is collected. During the next phase, we either segment the image, mask previously seen areas of the image, or combine the two techniques, and repeat the search. We compare the different methods proposed for the second search phase by evaluating the inspection method using true positive and false negative rates, and subjective workload. Results show that gaze-blocked configurations reduced the subjective workload, and that gaze-blocking without segmentation showed the largest increase in true positive identifications and the largest decrease in false negative identifications of previously unseen objects.

Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval - SIGIR '13, 2013

Proceedings of the 37th international ACM SIGIR conference on Research & development in information retrieval - SIGIR '14, 2014

ABSTRACT People often use more than one query when searching for information. They revisit search... more ABSTRACT People often use more than one query when searching for information. They revisit search results to re-find information and build an understanding of their search need through iterative explorations of query formulation. These tasks are not well-supported by search interfaces and web browsers. We designed and built SearchPanel, a Chrome browser extension that supports people in their ongoing information seeking. This extension combines document and process metadata into an interactive representation of the retrieved documents that can be used for sense-making, navigation, and re-finding documents. In a real-world deployment spanning over two months, results show that SearchPanel appears to have been primarily used for complex information needs, in search sessions with long durations and high numbers of queries. When process metadata was present in the UI, searchers in explorative search sessions submitted more and longer queries and interacted more with the SERP. These results indicate that the process metadata features in SearchPanel seem to be of particular importance for exploratory search.

Proceedings of the 2010 Symposium on Eye-Tracking Research & Applications - ETRA '10, 2010

In certain applications such as radiology and imagery analysis, it is important to minimize error... more In certain applications such as radiology and imagery analysis, it is important to minimize errors. In this paper we evaluate a structured inspection method that uses eye tracking information as a feedback mechanism to the image inspector. Our two-phase method starts with a free viewing phase during which gaze data is collected. During the next phase, we either segment the image, mask previously seen areas of the image, or combine the two techniques, and repeat the search. We compare the different methods proposed for the second search phase by evaluating the inspection method using true positive and false negative rates, and subjective workload. Results show that gaze-blocked configurations reduced the subjective workload, and that gaze-blocking without segmentation showed the largest increase in true positive identifications and the largest decrease in false negative identifications of previously unseen objects.

Computer Supported Cooperative Work, 2009

The Usable Smart Environment project (USE) aims at designing easy-to-use, highly functional next-... more The Usable Smart Environment project (USE) aims at designing easy-to-use, highly functional next-generation conference rooms. Our first design prototype focuses on creating a "no wizards" room for an American executive; that is, a room the executive could walk into and use by himself, without help from a technologist. A key idea in the USE framework is that customization is one of the best ways to create a smooth user experience. Since the system needs to fit both with the personal leadership style of the executive and the corporation's meeting culture, we began the design process by exploring the work flow in and around meetings attended by the executive.

In order to provoke a debate about the use of new technology, the Snatcher Catcher, an intrusive ... more In order to provoke a debate about the use of new technology, the Snatcher Catcher, an intrusive interactive refrigerator that keeps record of the items in it, was created. In this paper we present the fridge, and how we used it in a provocative installation. The results showed that the audience was provoked, and that few people wanted to have the fridge in their surroundings.

We have developed an interactive video search system that allows the searcher to rapidly assess q... more We have developed an interactive video search system that allows the searcher to rapidly assess query results and easily pivot off those results to form new queries. The system is intended to maximize the use of the discriminative power of the human searcher. The typical video search scenario we consider has a single searcher with the ability to search with text and content-based queries. In this paper, we evaluate a new collaborative modification of our search system. Using our system, two or more users with a common information need search together, simultaneously. The collaborative system provides tools, user interfaces and, most importantly, algorithmically-mediated retrieval to focus, enhance and augment the team's search and communication activities. In our evaluations, algorithmic mediation improved the collaborative performance of both retrieval (allowing a team of searchers to find relevant information more efficiently and effectively), and exploration (allowing the searchers to find relevant information that cannot be found while working individually). We present analysis and conclusions from comparative evaluations of the search system.

In this paper we present a solution to the problem of visualising large amount of hi- erarchical ... more In this paper we present a solution to the problem of visualising large amount of hi- erarchical information structures on small computer screens. Our solution has been implemented as a prototype for mobile use on a hand-held computer using Microsoft Pocket PC with a screen size of 240x320 pixels. The prototype uses the same in- formation as service engineers use

Design of information systems where spatial and temporalinformation is merged and can be accessed... more Design of information systems where spatial and temporalinformation is merged and can be accessed using variousmodalities requires careful examination on how to combinethe communication modalities to achieve efficient interaction.In this paper we present ongoing work on designing amultimodal interface with timetable information for localbuses where the same database information can be accessedby different user categories with various information needs.The prototype

In this paper we present an architecture for multi-modaldialogue systems. It is illustrated from ... more In this paper we present an architecture for multi-modaldialogue systems. It is illustrated from our development ofa multi-modal information system for local bus timetableinformation. The system is based on a natural languageinterface for typed interaction that is enhanced to handlealso multi-modal interaction. The multi-modal userinterface was designed based on empirical investigationsand some results from these investigations are presented.We also show

IFIP Conference on Human-Computer Interaction, 2003

Using speech input to augment the remote control can be an alternative interaction technique for ... more Using speech input to augment the remote control can be an alternative interaction technique for interactive television. However, little is known about how to design such a system that is suitable for the home environment. In this paper we explore possible error resolution strategies in the case of speech recognition errors in a TV-setting. From previous research two techniques have

Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval - SIGIR '13, 2013

ABSTRACT Exploratory search is a complex, iterative information seeking activity that involves ru... more ABSTRACT Exploratory search is a complex, iterative information seeking activity that involves running multiple queries and finding and examining many documents. We designed a query preview control that visualizes the distribution of newly-retrieved and re-retrieved documents prior to running the query. When evaluating the preview control with a control condition, we found effects on both people's information seeking behavior and improved retrieval performance. People spent more time formulating a query and were more likely to explore search results more deeply, retrieved a more diverse set of documents, and found more different relevant documents when using the preview.

Proceedings of the 37th international ACM SIGIR conference on Research & development in information retrieval - SIGIR '14, 2014

ABSTRACT People often use more than one query when searching for information. They revisit search... more ABSTRACT People often use more than one query when searching for information. They revisit search results to re-find information and build an understanding of their search need through iterative explorations of query formulation. These tasks are not well-supported by search interfaces and web browsers. We designed and built SearchPanel, a Chrome browser extension that supports people in their ongoing information seeking. This extension combines document and process metadata into an interactive representation of the retrieved documents that can be used for sense-making, navigation, and re-finding documents. In a real-world deployment spanning over two months, results show that SearchPanel appears to have been primarily used for complex information needs, in search sessions with long durations and high numbers of queries. When process metadata was present in the UI, searchers in explorative search sessions submitted more and longer queries and interacted more with the SERP. These results indicate that the process metadata features in SearchPanel seem to be of particular importance for exploratory search.

Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '08, 2008

We describe a new approach to information retrieval: algorithmic mediation for intentional, synch... more We describe a new approach to information retrieval: algorithmic mediation for intentional, synchronous collaborative exploratory search. Using our system, two or more users with a common information need search together, simultaneously. The collaborative system provides tools, user interfaces and, most importantly, algorithmically-mediated retrieval to focus, enhance and augment the team's search and communication activities. Collaborative search outperformed post hoc merging of similarly instrumented single user runs. Algorithmic mediation improved both collaborative search (allowing a team of searchers to find relevant information more efficiently and effectively), and exploratory search (allowing the searchers to find relevant information that cannot be found while working individually).

Proceedings of the 2010 Symposium on Eye-Tracking Research & Applications - ETRA '10, 2010

In certain applications such as radiology and imagery analysis, it is important to minimize error... more In certain applications such as radiology and imagery analysis, it is important to minimize errors. In this paper we evaluate a structured inspection method that uses eye tracking information as a feedback mechanism to the image inspector. Our two-phase method starts with a free viewing phase during which gaze data is collected. During the next phase, we either segment the image, mask previously seen areas of the image, or combine the two techniques, and repeat the search. We compare the different methods proposed for the second search phase by evaluating the inspection method using true positive and false negative rates, and subjective workload. Results show that gaze-blocked configurations reduced the subjective workload, and that gaze-blocking without segmentation showed the largest increase in true positive identifications and the largest decrease in false negative identifications of previously unseen objects.