Recently, I've run field experiments related to the use of digital media and the application of responsible behavioural design to an experimental news app. Currently, I do counselling related to the application of behavioural design in digital media and apps.
Behavioural economics, information aggregation mechanisms, market design, responsible behavioural design in digital media, consumer protection, design ethics, technology assessment, and governance.
Denoising and debiasing news to cultivate collective resilience (Timko 2026 forthcoming)
News are a product of media economy, and thus are influenced by business goals, which might not always be in line with reader interests. Standards, certification and crowd monitoring can denoise and debias news. Behavioral design can help readers to become resilient to low-quality news and together they can cultivate a so-called collective resilience. Relevant and high-quality news empower readers, who become able to shape the future and protect and nurture functioning democracies by making better informed decisions in business, policy, and any other field.
The impact of behavioral design and users' choice on smartphone app usage and willingness to pay: A framed field experiment (Timko & Adena 2026, EER European Economic Review) Slides at https://sites.google.com/view/christina-timko/news-app
Behavioral design in smartphone apps aims at inducing certain, monetizable behavior, mainly increased engagement, measurable by usage time. Such design is rarely transparent and often restricts users’ ability to make alternative choices. In a framed field experiment, we document that behavioral design doubles app usage time compared to a version without behavioral elements. Providing users with choices—simply explained and conveniently adjustable design features—reduces usage time and increases their willingness to pay for the app. These findings suggest that offering choice could pave the way for new business models based on more responsible app design.
Incentive Mechanism Design for Responsible Data Governance: A Large-Scale Field Experiment (Timko, Niederstadt, Goel, Faltings 2023, ACM Journal of Data and Information Quality) Slides at https://sites.google.com/view/christina-timko/platform-incentives
A crucial building block of responsible artificial intelligence is responsible data collection and governance. Its importance is also underlined in the latest EU regulations. The data should be of high quality, foremost correct and representative. In addition, individuals providing the data should have autonomy over what data is collected. In this paper, we consider the setting of collecting personally measured fitness data (physical activity measurements), in which individuals may not have an incentive to measure and report accurate data. This can significantly degrade the quality of the collected data. On the other hand, high-quality collective data of this nature could be used for reliable scientific insights or to build trustworthy artificial intelligence applications. We conduct a framed field experiment (N = 691) to examine the effect of offering fixed and quality-dependent monetary incentives, on the quality of the collected data. We use a peer-based incentive-compatible mechanism for the quality-dependent incentives without spot-checking or surveilling individuals. We find that the incentive-compatible mechanism can elicit good data while providing a good experience and compensating fairly. Although, in the specific study context the data quality does not differ under the two incentive schemes. We contribute new design insights from the experiment and discuss directions that future field experiments and applications on explainable and transparent data collection may focus on.
Dark Patterns - eine interdisziplinäre Analyse (Gertz, Martini, Seeliger, Timko 2023, Legal Tech Zeitschrift für die digitale Rechtanwendung)
Der Trendbegriff »Dark Patterns« hat Konjunktur. Er ist ebenso omnipräsent wie interpretationsoffen. Designmuster, die den Nutzer in eine bestimmte (verbraucherschädigende) Richtung lenken sollen, stellen Wissenschaft und Regulierungsbehörden sowie den Gesetzgeber vor besondere Herausforderungen. Um Dark Patterns in all ihren Facetten zu beleuchten und Gefahren für Verbraucher wirksam abzuwehren, bedarf es eines interdisziplinären Schulterschlusses der Verhaltensökonomie, Rechtswissenschaft und Informatik.
Governance von und durch Verhaltensdesign (Timko 2023, In: Mau, Schuhen, Froitzheim (Eds.) Verbraucherforschung zwischen Empowerment und Verletztlichkeit, Springer Gabler, Wiesbaden, pp. 9-28.)
Der Beitrag analysiert den Forschungsstand rund um das Thema Governance von und durch Verhaltensdesign in digitalen Medien und Anwendungen, basierend auf den Erkenntnissen aus mehreren Feldstudien. Die Feldstudien, die er vorstellt, wurden interdisziplinär aufbereitet durch die fünf Linsen der Rechtswissenschaften, Ethik, Informatik, Technikfolgenabschätzung und Verhaltensökonomie. Anhand der gewonnen Einsichten werden generelle Implikationen auf die Verbraucherforschung, die Gesellschaft und der Demokratie diskutiert. “Bequeme Verbraucher” werden durch eine verantwortungsvolle Anwendung von Verhaltensdesign herausgefordert, zum “lernenden, partizipativen Verbraucher” zu avancieren.
Von Softwareentwicklern über Softwareentwicklung (Timko, Schmidt, Niederstadt, Roos 2022, In: Hoeren / Pinelli (Eds.) Künstliche Intelligenz - Ethik und Recht, C.H.Beck, München, pp. 363-387.)
Durch Bias im Entwicklungsprozess können Softwareanwendungen, Algorithmen, KI und automatisierte Entscheidungssysteme unbeabsichtigt das Verhalten ihrer Nutzer beeinflussen und ungewollte Effekte hervorrufen.
Study about the Usage of Newsfeed Reader Apps Informing Behavioural Design (Timko et al. 2022, MPRA)
Reading newsfeeds gets more and more popular, although digital media contain an increasing number of hidden risks for users, such as the application of design elements that influence behaviour. In order to study the influence of such design elements, we investigate reading behaviour in the present study, which is a scoping study for a follow-up case study implementing a newsfeed reader app. Using a survey, we ask potential users of a newsfeed reader app about their reading habits and needs. Moreover, we ask participants to assess their risk perception of digital media with regard to the YouTube and Facebook apps. The overall 77 participants of the study were recruited at the Ruhr-University Bochum. We used an online survey to collect data. For the analysis of the descriptive data, we used figures and tables. The participants make up a demanding and conscious readership. Most of them read several times a day and often in between. They are conscious about the risks of digital and social media. An app design that aims to make readers reading more often has good chances to succeed in increasing reading frequency and thus also total reading time unless it contains more than one or two push notifications a day. We also recommend to build in social aspects, such as comparison of reading performance, and possibilities to discuss or rate articles. All-round but still transparent filtering options, a possibility to self-select news content, speed reading, text-to-speech, and reading aid functionalities are desirable. Distracting elements, such as gamification, ads, tabloid press and opinion bubbles should be avoided.
On the Effectiveness of Elected Male and Female Leaders and Team Coordination (Reuben & Timko 2018, JESA)
We study the effect on coordination in a minimum-effort game of a leader’s gender depending on whether the leader is democratically elected or is randomly-selected. Leaders use non-binding messages to try to convince followers to coordinate on the Pareto-efficient equilibrium. We find that teams with elected leaders coordinate on higher effort levels. Initially, the benefits of being elected are captured solely by male leaders. However, this gender difference disappears with repeated interaction because unsuccessful male leaders are reelected more often than unsuccessful female leaders.
In this paper, we reveal gender using avatars.
We study gender differences in the behavior and effectiveness of randomly selected leaders in a laboratory experiment using the minimum effort coordination game. Leaders can send non‐binding numeric messages to try to convince followers to coordinate on the Pareto‐efficient equilibrium. The treatment variations consist of the gender of the leader, and whether participants know or do not know the gender of the leader in their group. We find that female leaders choose more often to send a riskier high message in the beginning of the game, which hurts their effectiveness especially if gender is not revealed. However, if gender is revealed, both male and female leaders make more careful choices, and thus we do not observe any significant gender difference in leader effectiveness.
We study gender differences in the behavior, communication, and effectiveness of randomly selected leaders in a laboratory experiment using the turnaround game. Leaders can send nonbinding pre‐play text messages to try to convince followers to coordinate on the Pareto‐efficient equilibrium. The treatment variations consist of the gender of the leader, and whether the communication is one‐way (only leaders send messages) or two‐way (first followers send messages to their leader, and subsequently the leader sends messages to the group). We find that male leaders communicate more assertively. Communication with the followers induces female leaders to express significantly more often that they are part of the group, rather than standing above the group. Despite the different paths in communication, both men and women are equally likely to request the highest effort contribution. Men and women are equally effective leaders.
Whenever a common goal requires coordinated action of a team, leadership facilitates the endeavor. Up to date, women are still a minority in top-level business positions. Using variations of the minimum effort coordination game in laboratory experiments, we investigate the effectiveness of male and female leaders. The first study shows with a basic setup that men and women are equally effective leaders, no matter if gender is revealed or not. The second study considers communication styles and finds that despite the different paths in communication, men and women are equally effective leaders. The third study varies the selection process and presents a replication of the democracy effect on leader effectiveness using the turnaround game as studied earlier by Brandts et al. (2015). Moreover, we find that elected women are marginally less effective leaders than elected men, although the gender difference disappears with repeated interaction. The broad conclusion is that organizations can benefit from both employee participation in choosing group leaders and reconsidering gender imbalance in top-level positions.