Percorrer por autor "Caraban, Ana"
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- 23 ways to nudge: a review of technology-mediated nudging in human-computer interactionPublication . Caraban, Ana; Karapanos, Evangelos; Gonçalves, Daniel; Campos, PedroTen years ago, Thaler and Sunstein introduced the notion of nudging to talk about how subtle changes in the ‘choice archi tecture’ can alter people's behaviors in predictable ways. This idea was eagerly adopted in HCI and applied in multiple con texts, including health, sustainability and privacy. Despite this, we still lack an understanding of how to design effective technology-mediated nudges. In this paper we present a sys tematic review of the use of nudging in HCI research with the goal of laying out the design space of technology-mediated nudging –the why (i.e., which cognitive biases do nudges combat) and the how (i.e., what exact mechanisms do nudges employ to incur behavior change). All in all, we found 23 distinct mechanisms of nudging, grouped in 6 categories, and leveraging 15 different cognitive biases. We present these as a framework for technology-mediated nudging, and discuss the factors shaping nudges’ effectiveness and their ethical implications.
- Exploring the feasibility of subliminal priming on web platformsPublication . Caraban, Ana; Karapanos, Evangelos; Campos, Pedro; Gonçalves, DanielDespite the initial premise of behavior change tools, recent work has questioned their efficacy over the long term. Many of these technologies rely on a “one-size fits all” strategy – self-monitoring – to foster behavior change. However, individual’s capacity to change their behaviors depends on their ability and motivation for self-regulation. We explore a different approach to persuasive technology design and investigate how subtle influences falling outside conscious awareness can instinctively motivate behaviors. Subliminal priming has the potential to influence people's attitudes and behaviors, without relying on people’s will to engage with the process. Yet, little research has studied it effectiveness encouraging behavior change outside a laboratory setting. In this paper we explore the feasibility of subliminal priming on web-platforms. We present an in the wild study where 12 participants were exposed to subliminal cues to motivate water intake while they browsed on the web. This paper contributes with a practical application of subliminal priming in the field of behavior change as well as design implications for future research.
- The monarch room: an interactive system for visualization of global migration dataPublication . Caraban, Ana; Paulino, Teresa; Pereira, Ricardo; Spence, Robert; Campos, PedroRepresentation, presentation and interaction are subjects that require to be consciously contemplated while designing information visualization systems. This paper describes the ideation and design process of The Monarch Room, an information visualization system of global migration data. Our solution was designed to allow visitors of a museum to select, browse and interact with a visual interactive representation of migration flows in a unified view. Visitors can convey their learning purposes by seamlessly combining criteria such as time scales, location, and reasons behind migration, from either manual our automatic interactions. We believe our work contributes to the design of interfaces that enable a more in-depth understanding of global human migration patterns. In this paper, we describe our first design and research efforts.
- What shall i write next? Subliminal and supraliminal priming as triggers for creative writingPublication . Gonçalves, Frederica; Caraban, Ana; Karapanos, Evangelos; Campos, Pedro; Gonçalves, Frederica; Karapanos, Evangelos; Pereira Campos, Pedro FilipeCreative writing requires the manipulation of language in demanding ways, as individuals attempt to uniquely express themselves. As a result, during creative writing people often experience the writer’s block: a stress reaction that affects their ability to write. Addressing this problem, creativity support tools have been incorporating story prompts to instigate the creative process. However, such strategies distract the user from the writing task and impose cognitive load to get over the block. In this paper, we investigate subliminal priming as a novel technique to support creative writing. We developed a text-editor that provides conscious and unconscious textual hints during a writing task and explored its impact on user’s self-experienced creativity. Results showed that participants in the subliminal condition experienced more loss of self-consciousness when compared to the control condition. Self-report data revealed higher loss of self consciousness in the subliminal condition while the analysis of eye-tracking data and verbal-accounts revealed a stronger influence on people's thoughts during the supraliminal condition. We report our findings and conclude with insights for future research.
- Where2: exploring prior visitor journeys to enrich upcoming visitor’s experiencePublication . Caraban, Ana; Tranquada, Sara; Liao, Stephanie; Ks, Greicy; Schöning, Johannes; Campos, Pedro; Pereira Campos, Pedro FilipeIn recent years, the growth of the travel industry has been astounding. Yet, it is still not easy for an individual to have a meaningful travel experience even, so vast amounts of information are available on the web. As an attempt to support travel decision making and improve visitor’s experience, we designed Where2. Where2 is a location-based mobile app that highlights Points of Interest (POI) customized to tourist’s travel- related attributes (e.g. the length of their stay). POIs are in-situ recommendations proposed as “Ghost Paths” journeys - the idea that you can follow a prior tourist shoes to explore the city. We generate “Ghost Paths” journeys by using a non-intrusive positioning system that captures prior tourists’ Wi-Fi signal and detect their journeys across the city. With this system our goal is to support visitors with their travel decisions and nudge them towards optimal journey choices that maximize their utilities.