A carregar...
13 resultados
Resultados da pesquisa
A mostrar 1 - 10 de 13
- Citizen motivation on the go: the role of psychological empowermentPublication . Goncalves, J.; Kostakos, V.; Karapanos, E.; Barreto, M.; Camacho, T.; Tomasic, A.; Zimmerman, J.Although advances in technology now enable people to communicate ‘anytime, anyplace’, it is not clear how citizens can be motivated to actually do so. This paper evaluates the impact of three principles of psychological empowerment, namely perceived self-efficacy, sense of community and causal importance, on public transport passengers’ motivation to report issues and complaints while on the move. A week-long study with 65 participants revealed that self-efficacy and causal importance increased participation in short bursts and increased perceptions of service quality over longer periods. Finally, we discuss the implications of these findings for citizen participation projects and reflect on design opportunities for mobile technologies that motivate citizen participation.
- 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.
- Why don't families get along with eco-feedback technologies?Publication . Barreto, Mary; Karapanos, Evangelos; Nunes, NunoEco-feedback domestic technologies have gained momentum over the last decade. Yet, while a wide range of research prototypes and commercial products has been proposed, their acceptance by families is still limited. In this paper we report on our findings from interviews with 15 dual income families, during a year-long deployment of an eco-feedback technology that attempted to inquire into the factors that prohibited its adoption. We found the non adoption of our system to be rooted in a number of systemic failures, relating to the physical context, the families’ social dynamics and the roles assumed by family members, as well as families’ priorities and the non-negotiability of their routines. Motivated by prior work and our empirical findings we propose three distinct dimensions but also phases in the adoption of eco-feedback technologies: orientation, incorporation and social integration, and discuss how these may hint at different barriers in the adoption of eco-feedback technologies.
- 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.
- Understanding families’ motivations for sustainable behaviorsPublication . Barreto, Mary L.; Szóstek, Agnieszka; Karapanos, Evangelos; Nunes, Nuno J.; Pereira, Lucas; Quintal, FilipeWhile interest in eco-feedback technologies has peaked over the last decade, research increasingly high lights that simply providing information to individuals regarding their consumption behaviors does not guarantee behavior change. This has lead to an increasing body of work that attempts to characterize individuals’ latent motivations that drive sustainable behaviors. With this paper we aim at expanding this body of work by analyzing such motivations in the context of families. We report findings from inter views with 15 families who used an eco-feedback interface over a period of 2 years. Our study reveals that motivations for sustainable behavior were not only rooted in individuals’ environmental concerns and need for expense management but they also regarded: (i) individuals’ and families’ need for a sense of control and security, (ii) parents’ self-perceived responsibility of their role as parents and (iii) the percep tion of individual as well as family identity. We argue that in order for eco-feedback technologies to attain long-lasting behavioral changes in the domestic environment they need to address basic family needs that go beyond individual ideals of pro-environmental behavior
- Reducing children’s psychological distance from climate change via eco-feedback technologiesPublication . Dillahunt, Tawanna; Lyra, Olga; Barreto, Mary L.; Karapanos, EvangelosEmpirical environment and behavior research has found that empathy improves environmental attitudes and behaviors. Emotionally persuasive icons (EPIs) show promise for creating empathy and for the design of effective eco-feedback technologies, particularly among children. Yet studies using these icons have focused on adults, with little research devoted to eco-feedback design for children. We explore the affective reactions to EPIs among children ages 9–11. To understand which types of EPIs generate the most empathy, we vary them in two dimensions: (1) metaphorical versus literal representations and (2) animal scenes versus environmental scenes. Our findings suggest that the impact of EPIs extends beyond metaphorical or literal images; to improve eco-feedback technologies that employ EPIs, designers must link the causes and effects of climate change to concrete, tangible actions that are associated with personal experiences, which could lead to stronger engagement and emotional responses among children. These results are consistent with the construal level theory of psychological distance, which is the cognitive and affective perception of how close or far something is. We extend this theory to sustainable HCI and contribute a space for future eco-feedback design among children.
- An initial model for designing socially translucent systems for behavior changePublication . Barreto, Mary; Szóstek, Agnieszka; Karapanos, EvangelosApplications aiming at behavior change are gaining momentum within HCI. Much of that work has been built upon the idea of psychological empowerment. We report on a qualitative study that aimed at inquiring at an alternative path to behavior change through strengthening individuals’ feelings of personal accountability. Two behavior-change related scenarios were construed to evaluate how people perceive socially translucent systems aiding the process of behavior adaptation. We found that motivation to change is shaped by the access to information concerning one’s behavior, by the type of provided feedback and the strength of the social ties accessing that information. Based on these results we propose an initial model defining possible approaches that can be considered when designing socially translucent systems supporting behavior change.
- 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; Campos, Pedro Filipe PereiraCreative 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.
- How does the visual aesthetics of positively-framed messages impact their motivational capacity?Publication . Duro, Ligia; Romão, Teresa; Karapanos, Evangelos; Campos, Pedro; Karapanos, Evangelos; Campos, Pedro Filipe PereiraMany people nowadays engage with motivational text messages embedded in a visual presentation. However, empirical studies of the impact of textual messages on users’ motivation to exercise have paid little attention to how their visual appeal impacts their motivational capacity. We conducted an online experiment to explore the impact of visual aesthetics on the motivational capacity of positively-framed textual messages. Participants were assigned to three conditions: positively-framed messages a) presented as text-only (no-aesthetics), b) presented with high visual appeal (beautiful), and c) presented with low visual appeal (ugly). Contrary to our expectations, the perceived visual appeal of a message show no impact on its motivational capacity in terms of how motivating it was perceived to be, nor on extrinsic identified behavior regulation. The implications of these results on the design of interactive systems, and physical activity trackers in particular, are discussed herein.
- How do motivational text messages impact motivation to exercise?Publication . Duro, Ligia; Campos, Pedro F.; Romão, Teresa; Karapanos, Evangelos; Campos, Pedro Filipe Pereira ; Karapanos, EvangelosWe study the motives of regular and non-regular exercisers’ engagement with motivational text messages and the importance individuals attribute to visual presentation. A total of 160 individuals were surveyed (80 regular exercisers and 80 non regular exercisers). We found regular exercisers use motivational text messages in order to encourage their exercise routine. Non regular exercisers use motivational text messages mainly to try to boost their exercise motivation. Individuals, independent of their exercise profile, prefer to see motivational text messages presented in a mixed way, sometimes as text-only and sometimes embedded in a visual presentation. Participants reported that an aesthetically appealing visual presentation helps instill a positive feeling regarding the text, and the visual presentation was considered as important as the textual content. We conclude with a number of implications for the design of activity trackers.