Jürgen Pfeffer

Dr. Jürgen Pfeffer

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Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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28 November 2014 in Science
Verified
Journal Article
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DRDerek Ruths
Derek Ruths
JPJürgen Pfeffer
Jürgen Pfeffer
On 3 November 1948, the day after Harry Truman won the United States presidential elections, the Chicago Tribune published one of the most famous erroneous headlines in newspaper history: “Dewey Defeats Truman” (1, 2). The headline was informed by telephone surveys, which had inadvertently undersampled Truman supporters (1). Rather than permanently discrediting the practice of polling, this event led to the development of more sophisticated techniques and higher standards that produce the more accurate and statistically rigorous polls conducted today (3).

10 June 2013 in Journal of Marketing Communications
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Journal Article
Closed access
JPJürgen Pfeffer
Jürgen Pfeffer
TZT. Zorbach
T. Zorbach
KCKathleen M. Carley
Kathleen M. Carley
Social media are, on the one hand, a highly beneficial environment for word-of-mouth (WOM) propagation of new ideas and products, and this has increasingly made them a focus of marketing communications. On the other hand, companies and their brands as well as politicians, governmental institutions, and celebrities have increasingly been facing the impact of negative online WOM and complaint behavior. In reaction to any questionable statement or activity, social media users can create huge waves of outrage within just a few hours. These so-called online firestorms pose new challenges for marketing communications. In this article, we group observations from recent online firestorms, identify related social and economic science theories, and derive generalized factors that form the basis for the proliferation of these dynamics. Furthermore, we discuss the consequences of online firestorms for marketing communications, and offer courses of action for marketers to navigate through crises of negative online WOM.

30 January 2023 in EdArXiv
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Preprint
Open access
EKEnkelejda Kasneci
Enkelejda Kasneci
KSKathrin Seßler
Kathrin Seßler
Stefan KüchemannStefan Küchemann
Stefan Küchemann
MBMaria Bannert
Maria Bannert
DDDaryna Dementieva
Daryna Dementieva
GKGjergji Kasneci
Gjergji Kasneci
Large language models represent a significant advancement in the field of AI. The underlying technology is key to further innovations and, despite critical views and even bans within communities and regions, large language models are here to stay. This position paper presents the potential benefits and challenges of educational applications of large language models, from student and teacher perspectives. We briefly discuss the current state of large language models and their applications. We then highlight how these models can be used to create educational content, improve student engagement and interaction, and personalize learning experiences. With regard to challenges, we argue that large language models in education require teachers and learners to develop sets of competencies and literacies necessary to both understand the technology as well as their limitations and unexpected brittleness of such systems. In addition, a clear strategy within educational systems and a clear pedagogical approach with a strong focus on critical thinking and strategies for fact checking are required to integrate and take full advantage of large language models in learning settings and teaching curricula. Other challenges such as the potential bias in the output, the need for continuous human oversight, and the potential for misuse are not unique to the application of AI in education. But we believe that, if handled sensibly, these challenges can offer insights and opportunities in education scenarios to acquaint students early on with potential societal biases, criticalities, and risks of AI applications. We conclude with recommendations for how to address these challenges and ensure that such models are used in a responsible and ethical manner in education.

15 February 2014
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Conference Paper
Open access
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CCCarlos Castillo
Carlos Castillo
MEMohammed El-Haddad
Mohammed El-Haddad
JPJürgen Pfeffer
Jürgen Pfeffer
MSMatt Stempeck
Matt Stempeck
This paper presents a study of the life cycle of news articles posted online. We describe the interplay between website visitation patterns and social media reactions to news content. We show that we can use this hybrid observation method to characterize distinct classes of articles. We also find that social media reactions can help predict future visitation patterns early and accurately. We validate our methods using qualitative analysis as well as quantitative analysis on data from a large international news network, for a set of articles generating more than 3,000,000 visits and 200,000 social media reactions. We show that it is possible to model accurately the overall traffic articles will ultimately receive by observing the first ten to twenty minutes of social media reactions. Achieving the same prediction accuracy with visits alone would require to wait for three hours of data. We also describe significant improvements on the accuracy of the early prediction of shelf-life for news stories.Comment: Computer Supported Cooperative Work and Social Computing (CSCW 2014

1 December 2016 in Safety Science
Verified
Journal Article
Closed access
KCKathleen M. Carley
Kathleen M. Carley
MMMomin M. Malik
Momin M. Malik
PLPeter M. Landwehr
Peter M. Landwehr
JPJürgen Pfeffer
Jürgen Pfeffer
MKMichael Kowalchuck
Michael Kowalchuck

19 December 2018 in EPJ Data Science
Verified
Journal Article
Open access
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JPJürgen Pfeffer
Jürgen Pfeffer
KMKatja Mayer
Katja Mayer
FMFred Morstatter
Fred Morstatter
Social media data is widely analyzed in computational social science. Twitter, one of the largest social media platforms, is used for research, journalism, business, and government to analyze human behavior at scale. Twitter offers data via three different Application Programming Interfaces (APIs). One of which, Twitter’s Sample API, provides a freely available 1% and a costly 10% sample of all Tweets. These data are supposedly random samples of all platform activity. However, we demonstrate that, due to the nature of Twitter’s sampling mechanism, it is possible to deliberately influence these samples, the extent and content of any topic, and consequently to manipulate the analyses of researchers, journalists, as well as market and political analysts trusting these data sources. Our analysis also reveals that technical artifacts can accidentally skew Twitter’s samples. Samples should therefore not be regarded as random. Our findings illustrate the critical limitations and general issues of big data sampling, especially in the context of proprietary data and undisclosed details about data handling.