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116 results on '"Zugal, Stefan"'

1. Cheetah Experimental Platform Web 1.0: Cleaning Pupillary Data

Author

Zugal, Stefan, Pinggera, Jakob, Neurauter, Manuel, Maran, Thomas, and Weber, Barbara

Subjects
Computer Science - Human-Computer Interaction
Abstract

Recently, researchers started using cognitive load in various settings, e.g., educational psychology, cognitive load theory, or human-computer interaction. Cognitive load characterizes a tasks' demand on the limited information processing capacity of the brain. The widespread adoption of eye-tracking devices led to increased attention for objectively measuring cognitive load via pupil dilation. However, this approach requires a standardized data processing routine to reliably measure cognitive load. This technical report presents CEP-Web, an open source platform to providing state of the art data processing routines for cleaning pupillary data combined with a graphical user interface, enabling the management of studies and subjects. Future developments will include the support for analyzing the cleaned data as well as support for Task-Evoked Pupillary Response (TEPR) studies.

Published
2017

2. Low-Cost Eye-Trackers: Useful for Information Systems Research?

Author

Zugal, Stefan and Pinggera, Jakob

Subjects
Computer Science - Human-Computer Interaction, Computer Science - Computers and Society
Abstract

Research investigating cognitive aspects of information systems is often dependent on detail-rich data. Eye-trackers promise to provide respective data, but the associated costs are often beyond the researchers' budget. Recently, eye-trackers have entered the market that promise eye-tracking support at a reasonable price. In this work, we explore whether such eye-trackers are of use for information systems research and explore the accuracy of a low-cost eye-tracker (Gazepoint GP3) in an empirical study. The results show that Gazepoint GP3 is well suited for respective research, given that experimental material acknowledges the limits of the eye-tracker. To foster replication and comparison of results, all data, experimental material as well as the source code developed for this study are made available online.

Published
2015
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3. Investigating the Process of Process Modeling with Eye Movement Analysis

Author

Pinggera, Jakob, Furtner, Marco, Martini, Markus, Sachse, Pierre, Reiter, Katharina, Zugal, Stefan, and Weber, Barbara

Subjects
Computer Science - Software Engineering
Abstract

Research on quality issues of business process models has recently begun to explore the process of creating process models by analyzing the modeler's interactions with the modeling environment. In this paper we aim to complement previous insights on the modeler's modeling behavior with data gathered by tracking the modeler's eye movements when engaged in the act of modeling. We present preliminary results and outline directions for future research to triangulate toward a more comprehensive understanding of the process of process modeling. We believe that combining different views on the process of process modeling constitutes another building block in understanding this process that will ultimately enable us to support modelers in creating better process models., Comment: arXiv admin note: text overlap with arXiv:1511.04057

Published
2015
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4. Tying Process Model Quality to the Modeling Process: The Impact of Structuring, Movement, and Speed

Author

Claes, Jan, Vanderfeesten, Irene, Reijers, Hajo A., Pinggera, Jakob, Weidlich, Matthias, Zugal, Stefan, Fahland, Dirk, Weber, Barbara, Mendling, Jan, and Poels, Geert

Subjects
Computer Science - Software Engineering
Abstract

In an investigation into the process of process modeling, we examined how modeling behavior relates to the quality of the process model that emerges from that. Specifically, we considered whether (i) a modeler's structured modeling style, (ii) the frequency of moving existing objects over the modeling canvas, and (iii) the overall modeling speed is in any way connected to the ease with which the resulting process model can be understood. In this paper, we describe the exploratory study to build these three conjectures, clarify the experimental set-up and infrastructure that was used to collect data, and explain the used metrics for the various concepts to test the conjectures empirically. We discuss various implications for research and practice from the conjectures, all of which were confirmed by the experiment.

Published
2015
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5. Modeling Styles in Business Process Modeling

Author

Pinggera, Jakob, Soffer, Pnina, Zugal, Stefan, Weber, Barbara, Weidlich, Matthias, Fahland, Dirk, Reijers, Hajo A., and Mendling, Jan

Subjects
Computer Science - Software Engineering
Abstract

Research on quality issues of business process models has recently begun to explore the process of creating process models. As a consequence, the question arises whether different ways of creating process models exist. In this vein, we observed 115 students engaged in the act of modeling, recording all their interactions with the modeling environment using a specialized tool. The recordings of process modeling were subsequently clustered. Results presented in this paper suggest the existence of three distinct modeling styles, exhibiting significantly different characteristics. We believe that this finding constitutes another building block toward a more comprehensive understanding of the process of process modeling that will ultimately enable us to support modelers in creating better business process models.

Published
2015
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6. Expressiveness and Understandability Considerations of Hierarchy in Declarative Business Process Models

Author

Zugal, Stefan, Soffer, Pnina, Pinggera, Jakob, and Weber, Barbara

Subjects
Computer Science - Software Engineering
Abstract

Hierarchy has widely been recognized as a viable approach to deal with the complexity of conceptual models. For instance, in declarative business process models, hierarchy is realized by sub-processes. While technical implementations of declarative sub-processes exist, their application, semantics, and the resulting impact on understandability are less understood yet-this research gap is addressed in this work. In particular, we discuss the semantics and the application of hierarchy and show how sub-processes enhance the expressiveness of declarative modeling languages. Then, we turn to the impact on the understandability of hierarchy on a declarative process model. To systematically assess this impact, we present a cognitive-psychology based framework that allows to assess the possible impact of hierarchy on the understandability of the process model.

Published
2015
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7. Investigating Differences between Graphical and Textual Declarative Process Models

Author

Haisjackl, Cornelia and Zugal, Stefan

Subjects
Computer Science - Software Engineering
Abstract

Declarative approaches to business process modeling are regarded as well suited for highly volatile environments, as they enable a high degree of flexibility. However, problems in understanding declarative process models often impede their adoption. Particularly, a study revealed that aspects that are present in both imperative and declarative process modeling languages at a graphical level-while having different semantics-cause considerable troubles. In this work we investigate whether a notation that does not contain graphical lookalikes, i.e., a textual notation, can help to avoid this problem. Even though a textual representation does not suffer from lookalikes, in our empirical study it performed worse in terms of error rate, duration and mental effort, as the textual representation forces the reader to mentally merge the textual information. Likewise, subjects themselves expressed that the graphical representation is easier to understand.

Published
2015
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8. Making Sense of Declarative Process Models: Common Strategies and Typical Pitfalls

Author

Haisjackl, Cornelia, Zugal, Stefan, Soffer, Pnina, Hadar, Irit, Reichert, Manfred, Pinggera, Jakob, and Weber, Barbara

Subjects
Computer Science - Software Engineering
Abstract

Declarative approaches to process modeling are regarded as well suited for highly volatile environments as they provide a high degree of flexibility. However, problems in understanding and maintaining declarative business process models impede often their usage. In particular, how declarative models are understood has not been investigated yet. This paper takes a first step toward addressing this question and reports on an exploratory study investigating how analysts make sense of declarative process models. We have handed out real-world declarative process models to subjects and asked them to describe the illustrated process. Our qualitative analysis shows that subjects tried to describe the processes in a sequential way although the models represent circumstantial information, namely, conditions that produce an outcome, rather than a sequence of activities. Finally, we observed difficulties with single building blocks and combinations of relations between activities.

Published
2015
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9. Identifying Quality Issues in BPMN Models: an Exploratory Study

Author

Haisjackl, Cornelia, Pinggera, Jakob, Soffer, Pnina, Zugal, Stefan, Lim, Shao Yi, Weber, Barbara, van der Aalst, Wil, Series editor, Mylopoulos, John, Series editor, Rosemann, Michael, Series editor, Shaw, Michael J., Series editor, Szyperski, Clemens, Series editor, Gaaloul, Khaled, editor, Schmidt, Rainer, editor, Nurcan, Selmin, editor, Guerreiro, Sérgio, editor, and Ma, Qin, editor

Published
2015
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10. Measuring Cognitive Load During Process Model Creation

Author

Weber, Barbara, Neurauter, Manuel, Pinggera, Jakob, Zugal, Stefan, Furtner, Marco, Martini, Markus, Sachse, Pierre, Spagnoletti, Paolo, Series editor, De Marco, Marco, Series editor, Pouloudi, Nancy, Series editor, Te'eni, Dov, Series editor, vom Brocke, Jan, Series editor, Winter, Robert, Series editor, Baskerville, Richard, Series editor, Davis, Fred D., editor, Riedl, René, editor, Léger, Pierre-Majorique, editor, and Randolph, Adriane B., editor

Published
2015
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11. The Modeling Mind: Behavior Patterns in Process Modeling

Author

Pinggera, Jakob, Zugal, Stefan, Furtner, Marco, Sachse, Pierre, Martini, Markus, Weber, Barbara, van der Aalst, Wil, editor, Mylopoulos, John, editor, Rosemann, Michael, editor, Shaw, Michael J., editor, Szyperski, Clemens, editor, Bider, Ilia, editor, Gaaloul, Khaled, editor, Krogstie, John, editor, Nurcan, Selmin, editor, Proper, Henderik A., editor, Schmidt, Rainer, editor, and Soffer, Pnina, editor

Published
2014
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14. Making Sense of Declarative Process Models: Common Strategies and Typical Pitfalls

Author

Haisjackl, Cornelia, Zugal, Stefan, Soffer, Pnina, Hadar, Irit, Reichert, Manfred, Pinggera, Jakob, Weber, Barbara, van der Aalst, Wil, editor, Mylopoulos, John, editor, Rosemann, Michael, editor, Shaw, Michael J., editor, Szyperski, Clemens, editor, Nurcan, Selmin, editor, Proper, Henderik A., editor, Soffer, Pnina, editor, Krogstie, John, editor, Schmidt, Rainer, editor, Halpin, Terry, editor, and Bider, Ilia, editor

Published
2013
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17. Expressiveness and Understandability Considerations of Hierarchy in Declarative Business Process Models

Author

Zugal, Stefan, Soffer, Pnina, Pinggera, Jakob, Weber, Barbara, van der Aalst, Wil, editor, Mylopoulos, John, editor, Rosemann, Michael, editor, Shaw, Michael J., editor, Szyperski, Clemens, editor, Bider, Ilia, editor, Halpin, Terry, editor, Krogstie, John, editor, Nurcan, Selmin, editor, Proper, Erik, editor, Schmidt, Rainer, editor, Soffer, Pnina, editor, and Wrycza, Stanisław, editor

Published
2012
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18. Modeling Styles in Business Process Modeling

Author

Pinggera, Jakob, Soffer, Pnina, Zugal, Stefan, Weber, Barbara, Weidlich, Matthias, Fahland, Dirk, Reijers, Hajo A., Mendling, Jan, van der Aalst, Wil, editor, Mylopoulos, John, editor, Rosemann, Michael, editor, Shaw, Michael J., editor, Szyperski, Clemens, editor, Bider, Ilia, editor, Halpin, Terry, editor, Krogstie, John, editor, Nurcan, Selmin, editor, Proper, Erik, editor, Schmidt, Rainer, editor, Soffer, Pnina, editor, and Wrycza, Stanisław, editor

Published
2012
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21. Tracing the Process of Process Modeling with Modeling Phase Diagrams

Author

Pinggera, Jakob, Zugal, Stefan, Weidlich, Matthias, Fahland, Dirk, Weber, Barbara, Mendling, Jan, Reijers, Hajo A., van der Aalst, Wil, Series editor, Mylopoulos, John, Series editor, Rosemann, Michael, Series editor, Shaw, Michael J., Series editor, Szyperski, Clemens, Series editor, Daniel, Florian, editor, Barkaoui, Kamel, editor, and Dustdar, Schahram, editor

Published
2012
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22. Tying Process Model Quality to the Modeling Process: The Impact of Structuring, Movement, and Speed

Author

Claes, Jan, Vanderfeesten, Irene, Reijers, Hajo A., Pinggera, Jakob, Weidlich, Matthias, Zugal, Stefan, Fahland, Dirk, Weber, Barbara, Mendling, Jan, Poels, Geert, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Barros, Alistair, editor, Gal, Avigdor, editor, and Kindler, Ekkart, editor

Published
2012
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23. Assessing the Impact of Hierarchy on Model Understandability – A Cognitive Perspective

Author

Zugal, Stefan, Pinggera, Jakob, Weber, Barbara, Mendling, Jan, Reijers, Hajo A., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Kienzle, Jörg, editor

Published
2012
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24. The Impact of Testcases on the Maintainability of Declarative Process Models

Author

Zugal, Stefan, Pinggera, Jakob, Weber, Barbara, van der Aalst, Wil, Series editor, Mylopoulos, John, Series editor, Rosemann, Michael, Series editor, Shaw, Michael J., Series editor, Szyperski, Clemens, Series editor, Halpin, Terry, editor, Nurcan, Selmin, editor, Krogstie, John, editor, Soffer, Pnina, editor, Proper, Erik, editor, Schmidt, Rainer, editor, and Bider, Ilia, editor

Published
2011
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27. How the Structuring of Domain Knowledge Helps Casual Process Modelers

Author

Pinggera, Jakob, Zugal, Stefan, Weber, Barbara, Fahland, Dirk, Weidlich, Matthias, Mendling, Jan, Reijers, Hajo A., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Parsons, Jeffrey, editor, Saeki, Motoshi, editor, Shoval, Peretz, editor, Woo, Carson, editor, and Wand, Yair, editor

Published
2010
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29. Declarative versus Imperative Process Modeling Languages: The Issue of Understandability

Author

Fahland, Dirk, Lübke, Daniel, Mendling, Jan, Reijers, Hajo, Weber, Barbara, Weidlich, Matthias, Zugal, Stefan, van der Aalst, Will, Series editor, Mylopoulos, John, Series editor, Sadeh, Norman M., Series editor, Shaw, Michael J., Series editor, Szyperski, Clemens, Series editor, Halpin, Terry, editor, Krogstie, John, editor, Nurcan, Selmin, editor, Proper, Erik, editor, Schmidt, Rainer, editor, Soffer, Pnina, editor, and Ukor, Roland, editor

Published
2009
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30. Bringing the XML and Semantic Web Worlds Closer: Transforming XML into RDF and Embedding XPath into SPARQL

Author

Droop, Matthias, Flarer, Markus, Groppe, Jinghua, Groppe, Sven, Linnemann, Volker, Pinggera, Jakob, Santner, Florian, Schier, Michael, Schöpf, Felix, Staffler, Hannes, Zugal, Stefan, van der Aalst, Will, Series editor, Mylopoulos, John, Series editor, Sadeh, Norman M., Series editor, Shaw, Michael J., Series editor, Szyperski, Clemens, Series editor, Filipe, Joaquim, editor, and Cordeiro, José, editor

Published
2009
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31. The Declarative Approach to Business Process Execution: An Empirical Test

Author

Weber, Barbara, Reijers, Hajo A., Zugal, Stefan, Wild, Werner, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, van Eck, Pascal, editor, Gordijn, Jaap, editor, and Wieringa, Roel, editor

Published
2009
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38. Alaska Simulator – A Journey to Planning

Author

Weber, Barbara, Pinggera, Jakob, Zugal, Stefan, Wild, Werner, van der Aalst, Will, Series editor, Mylopoulos, John, Series editor, Sadeh, Norman M., Series editor, Shaw, Michael J., Series editor, Szyperski, Clemens, Series editor, Abrahamsson, Pekka, editor, Marchesi, Michele, editor, and Maurer, Frank, editor

Published
2009
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39. Translating XPath Queries into SPARQL Queries

Author

Droop, Matthias, Flarer, Markus, Groppe, Jinghua, Groppe, Sven, Linnemann, Volker, Pinggera, Jakob, Santner, Florian, Schier, Michael, Schöpf, Felix, Staffler, Hannes, Zugal, Stefan, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Meersman, Robert, editor, Tari, Zahir, editor, and Herrero, Pilar, editor

Published
2007
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45. Modeling Styles in Business Process Modeling

Author

Pinggera, Jakob, primary, Soffer, Pnina, additional, Zugal, Stefan, additional, Weber, Barbara, additional, Weidlich, Matthias, additional, Fahland, Dirk, additional, Reijers, Hajo A., additional, and Mendling, Jan, additional

Published
2012
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