The Cost of Captured Attention: Experimental Evidence on App Design, User Agency and Developer Responsibility
Timko, Adena: "The Impact of Behavioral Design and Users’ Choice on Smartphone App Usage and Willingness to Pay: A Framed Field Experiment" European Economic Review, Volume 183
In their research on smartphone app usage, Christina Timko and Maja Adena (WZB Berlin, Project A05) explore whether behavioral design (often used to increase user engagement) can be reconciled with corporate social responsibility through the implementation of user choice. Using a custom-built news app in a framed field experiment, the authors tested three design paradigms: a minimal functional baseline, a full behavioral design featuring gamification, personalized algorithms, and tailored push notifications, and a “Choice” version that allowed users to adjust, ignore, or deactivate these same behavioral design elements.
The experiment’s results reveal that behavioral design effectively doubles average app usage time compared to the minimal baseline. Specifically, participants in the Behavioral Design group averaged nearly ten minutes of usage per day, whereas Baseline users averaged less than five minutes. The Choice treatment, which combined behavioral design elements with transparency and control, resulted in an intermediate usage time of approximately six minutes per day. The data further suggests that providing users with the tools to monitor and adjust design features facilitates digital self-regulation over time, as the Choice group showed a more pronounced decline in usage throughout the study compared to the other groups.
A critical finding for both scholars and practitioners is that increased engagement does not necessarily lead to higher economic valuation; the willingness to pay was lowest in the Behavioral Design group. Across multiple payment models, including monthly subscriptions and donations, users who experienced the full behavioral design without choice offered significantly lower valuations than those in the Choice or Baseline groups. This indicates that while aggressive behavioral design successfully captures attention, it may also degrade the user experience or alert users to addictive design patterns, thereby reducing the product’s perceived value.
The study highlights a significant demand for user autonomy, noting that 74% of participants in the Choice group adjusted at least one default setting, such as notification frequency or news filtering. These findings provide a documented proof of concept for responsible app development, suggesting that transparency and user control can align business goals with ethical practices. Although the authors note limitations, such as the two-week timeframe and a modest student sample, the research demonstrates that choice-based designs can enhance user agency and foster higher willingness to pay, offering a potential shift toward more sustainable and responsible digital business models.
