Roberto Ulloa
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View article: From prosthetic memory to prosthetic denial: auditing whether large language models are prone to mass atrocity denialism
From prosthetic memory to prosthetic denial: auditing whether large language models are prone to mass atrocity denialism Open
The proliferation of large language models (LLMs) can influence how historical narratives are disseminated and perceived. This study explores the implications of LLMs’ responses on the representation of mass atrocity memory, examining whet…
View article: From prosthetic memory to prosthetic denial: Auditing whether large language models are prone to mass atrocity denialism
From prosthetic memory to prosthetic denial: Auditing whether large language models are prone to mass atrocity denialism Open
The proliferation of large language models (LLMs) can influence how historical narratives are disseminated and perceived. This study explores the implications of LLMs' responses on the representation of mass atrocity memory, examining whet…
View article: The Future Could be Greener: A Randomized Choice Experiment on Cognitive Alternatives and Sustainable Food Choices
The Future Could be Greener: A Randomized Choice Experiment on Cognitive Alternatives and Sustainable Food Choices Open
Carbon footprint information via labels has raised interest as a tool to encourage pro‐environmental behavior. We propose cognitive alternatives to the environmental status quo ( Environmental cognitive alternatives ; ECAs), the ability to…
View article: Tag-Pag: A Dedicated Tool for Systematic Web Page Annotations
Tag-Pag: A Dedicated Tool for Systematic Web Page Annotations Open
Tag-Pag is an application designed to simplify the categorization of web pages, a task increasingly common for researchers who scrape web pages to analyze individuals' browsing patterns or train machine learning classifiers. Unlike existin…
View article: Characteristics of ChatGPT users from Germany: Implications for the digital divide from web tracking data
Characteristics of ChatGPT users from Germany: Implications for the digital divide from web tracking data Open
A major challenge of our time is reducing disparities in access to and effective use of digital technologies, with recent discussions highlighting the role of AI in exacerbating the digital divide. We examine user characteristics that pred…
View article: Self-directed online information search can affect policy support: a randomized encouragement design with digital behavioral data
Self-directed online information search can affect policy support: a randomized encouragement design with digital behavioral data Open
The abundance of information sources in our digital environment makes it difficult to study how such information shapes individuals' support for current policies. Our study with 791 German participants investigates self-directed online sea…
View article: Beyond time delays: How web scraping distorts measures of online news consumption
Beyond time delays: How web scraping distorts measures of online news consumption Open
As the exploration of digital behavioral data revolutionizes communication research, understanding the nuances of data collection methodologies becomes increasingly pertinent. This study focuses on one prominent data collection approach, w…
View article: Examining bias perpetuation in academic search engines: An algorithm audit of Google and Semantic Scholar
Examining bias perpetuation in academic search engines: An algorithm audit of Google and Semantic Scholar Open
Researchers rely on academic Web search engines to find scientific sources, but search engine mechanisms may selectively present content that aligns with biases embedded in queries. This study examines whether confirmation biased queries p…
View article: Googling the Big Lie: Search Engines, News Media, and the US 2020 Election Conspiracy
Googling the Big Lie: Search Engines, News Media, and the US 2020 Election Conspiracy Open
The conspiracy theory that the US 2020 presidential election was fraudulent - the Big Lie - remained a prominent part of the media agenda months after the election. Whether and how search engines prioritized news stories that sought to tho…
View article: An inclusive, empirically grounded inventory facilitates recognition of diverse area-based conservation of nature
An inclusive, empirically grounded inventory facilitates recognition of diverse area-based conservation of nature Open
As the international community strives to conserve 30% of Earth's lands and waters by 2030, the full extent of area-based conservation remains unclear. Official databases do not fully recognize and track the diversity of conservation-relev…
View article: Facebook as an Avenue to News: A Comparison and Validation of Approaches to Identify Facebook Referrals
Facebook as an Avenue to News: A Comparison and Validation of Approaches to Identify Facebook Referrals Open
Given that Facebook is still the most widely used social networking site in the world, its influence on democratic processes is under constant scrutiny. Academics have put a special focus on Facebook's role in inhibiting or enhancing citiz…
View article: Improving the quality of individual-level online information tracking: challenges of existing approaches and introduction of a new content- and long-tail sensitive academic solution
Improving the quality of individual-level online information tracking: challenges of existing approaches and introduction of a new content- and long-tail sensitive academic solution Open
This article evaluates the quality of data collection in individual-level desktop information tracking used in the social sciences and shows that the existing approaches face sampling issues, validity issues due to the lack of content-leve…
View article: Predicting political attitudes from web tracking data: a machine learning approach
Predicting political attitudes from web tracking data: a machine learning approach Open
Anecdotal evidence suggests that the surge of populism and subsequent political polarization might make voters' political preferences more detectable from digital trace data. This potential scenario could expose voters to the risk of being…
View article: AI and Archives: How can Technology Help Preserve Holocaust Heritage Under the Risk of Disappearance?
AI and Archives: How can Technology Help Preserve Holocaust Heritage Under the Risk of Disappearance? Open
Russia launched its full-scale invasion of Ukraine, a resumption and an expansion of a conflict that had begun with an incursion into eastern Ukraine and Crimea in 2014.In addition to the massive loss of lives and destruction of civilian i…
View article: Enhancing autonomous vehicle acceptance with age and education sensitive simulation interventions: An experimental trial
Enhancing autonomous vehicle acceptance with age and education sensitive simulation interventions: An experimental trial Open
The familiarity principle posits that acceptance increases with exposure, which has previously been shown with in vivo and simulated experiences with connected and autonomous vehicles (CAVs). We investigate the impact of a simulated video-…
View article: Constants and Variables: How Does the Visual Representation of the Holocaust by AI Change Over Time
Constants and Variables: How Does the Visual Representation of the Holocaust by AI Change Over Time Open
Peer reviewed
View article: Examining bias perpetuation in academic search engines: an algorithm audit of Google and Semantic Scholar
Examining bias perpetuation in academic search engines: an algorithm audit of Google and Semantic Scholar Open
Researchers rely on academic Web search engines to find scientific sources, but search engine mechanisms may selectively present content that aligns with biases embedded in queries. This study examines whether confirmation biased queries p…
View article: Characteristics of ChatGPT users from Germany: implications for the digital divide from web tracking data
Characteristics of ChatGPT users from Germany: implications for the digital divide from web tracking data Open
A major challenge of our time is reducing disparities in access to and effective use of digital technologies, with recent discussions highlighting the role of AI in exacerbating the digital divide. We examine user characteristics that pred…
View article: Novelty in News Search: A Longitudinal Study of the 2020 US Elections
Novelty in News Search: A Longitudinal Study of the 2020 US Elections Open
The 2020 US elections news coverage was extensive, with new pieces of information generated rapidly. This evolving scenario presented an opportunity to study the performance of search engines in a context in which they had to quickly proce…
View article: Shall androids dream of genocides? How generative AI can change the future of memorialization of mass atrocities
Shall androids dream of genocides? How generative AI can change the future of memorialization of mass atrocities Open
The memorialization of mass atrocities such as war crimes and genocides facilitates the remembrance of past suffering, honors those who resisted the perpetrators, and helps prevent the distortion of historical facts. Digital technologies h…
View article: Shall androids dream of genocides? How generative AI can change the future of memorialization of mass atrocities
Shall androids dream of genocides? How generative AI can change the future of memorialization of mass atrocities Open
The memorialization of mass atrocities such as war crimes and genocides facilitates the remembrance of past suffering, honors those who resisted the perpetrators, and helps prevent the distortion of historical facts. Digital technologies h…
View article: REFUGEE OR EXPAT, HERO OR THREAT: MIGRANT QUERIES IN GOOGLE NEWS SEARCH RESULTS
REFUGEE OR EXPAT, HERO OR THREAT: MIGRANT QUERIES IN GOOGLE NEWS SEARCH RESULTS Open
Search engines play a gatekeeper role in current high-choice information environments. Considered a form of new media, users are still more likely to find and trust news found through search than social media sites. Indeed, search engines …
View article: Facebook as an Avenue to News: A Comparison and Validation of Approaches to Identify Facebook Referrals
Facebook as an Avenue to News: A Comparison and Validation of Approaches to Identify Facebook Referrals Open
Given that Facebook is still the most widely used social networking site in the world, its influence on democratic processes is under constant scrutiny. Academics have put a special focus on Facebook's role in inhibiting or enhancing citiz…
View article: Search engine effects on news consumption: Ranking and representativeness outweigh familiarity in news selection
Search engine effects on news consumption: Ranking and representativeness outweigh familiarity in news selection Open
While individuals’ trust in search engine results is well-supported, little is known about their preferences when selecting news. We use web-tracked behavioral data across a 2-month period (280 participants) and we analyze three competing …
View article: Memory, counter-memory and denialism: How search engines circulate information about the Holodomor-related memory wars
Memory, counter-memory and denialism: How search engines circulate information about the Holodomor-related memory wars Open
Search engines, such as Google or Yandex, shape social reality by informing their users about current and historical phenomena. However, there is little research on how search engines deal with contested memories, which are subjected to on…
View article: Novelty in news search: a longitudinal study of the 2020 US elections
Novelty in news search: a longitudinal study of the 2020 US elections Open
The 2020 US elections news coverage was extensive, with new pieces of information generated rapidly. This evolving scenario presented an opportunity to study the performance of search engines in a context in which they had to quickly proce…