Browsing by Author "Campos, Pedro"
Now showing 1 - 10 of 56
Results Per Page
Sort Options
- 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.
- Abalearn: a risk-sensitive approach to self-play learning in AbalonePublication . Campos, Pedro; Langlois, ThibaultThis paper presents Abalearn, a self-teaching Abalone pro gram capable of automatically reaching an intermediate level of play without needing expert-labeled training examples, deep searches or ex posure to competent play. Our approach is based on a reinforcement learning algorithm that is risk seeking, since defensive players in Abalone tend to never end a game. We show that it is the risk-sensitivity that allows a successful self-play training. We also propose a set of features that seem relevant for achiev ing a good level of play. We evaluate our approach using a fixed heuristic opponent as a bench mark, pitting our agents against human players online and comparing samples of our agents at different times of training.
- Associations between muscular strength and vertical jumping performance in adolescent male football playersPublication . França, Cíntia; Marques, Adilson; Ihle, Andreas; Nuno, João; Campos, Pedro; Gonçalves, Frederica; Martins, João; Gouveia, ÉlvioThis study aimed to investigate the associations between muscular strength tests and vertical jumping performance (countermovement jump [CMJ] and squat jump [SJ]) in adolescent male football players, while controlling for important predictors such as chronological age and body composition. Methods. The sample involved 161 male footballers (mean age: 15.8 ± 1.7 years) from the under-19, under-17, and under-15 age groups. Body fat percentage (BF%) was calculated with Slaughter equations. Muscular strength assessment included handgrip strength and push-up and sit-up tests. Vertical jumping was examined through CMJ and SJ. Pearson correlations and hierarchical regression analyses were run to analyse the data. Results. All muscular strength tests showed significant correlations with CMJ and SJ. Handgrip strength was the most substantial predictor for CMJ (r = 0.43, p < 0.01) and SJ (r = 0.44, p < 0.01). However, regression models identified sit-ups (CMJ: = 0.15, p < 0.01, R2 = 0.23; SJ: = 0.16, p < 0.01, R2 = 0.27) and push-ups (CMJ: = 0.13, p < 0.01; SJ: = 0.15, p < 0.01) as significant predictors after controlling for chronological age, body mass, and BF%. In contrast, BF% remained a significant predictor of jumping performance (CMJ: = –0.43, p < 0.01, R2 = –0.39; SJ: = –0.52, p < 0.01, R2 = –0.52) in the whole hierarchical regression model. Conclusions. This study reinforces the importance of players’ overall physical development, including healthy diet habits, to enhance jumping performance.
- Atmos: a hybrid crowdsourcing approach to weather estimationPublication . Niforatos, Evangelos; Vourvopoulos, Athanasios; Langheinrich, Marc; Campos, Pedro; Doria, AndreMotivated by the novel paradigm of participatory sensing in collecting in situ automated data and human input we introduce the Atmos platform. Atmos leverages a crowd-sourcing network of mobile devices for the collection of in situ weather related sensory data, provided by available on-board sensors, along with human input, to generate highly localized information about current and future weather conditions. In this paper, we share our first insights of an 8-month long deployment of Atmos mobile app on Google Play that gathered data from a total of 9 countries across 3 continents. Furthermore, we describe the underlying system infrastructure and showcase how a hybrid people-centric and environment-centric approach to weather estimation could benefit forecasting. Finally, we present our preliminary results originating from questionnaires inquiring into how people perceive the weather, how they use technology to know about the weather and how it affects their habits.
- CanonSketch and TaskSketch: innovative modeling tools for usage-centered designPublication . Constantine, Larry; Campos, PedroTwo experimental tools to support usage-centered design using essential use cases and canonical abstract prototypes are described. The models and methods of usage-centered design are outlined and the new tools are described briefly.
- Citizen X: designing for holistic community engagementPublication . Ashby, Simone; Hanna, Julian; Oakley, Ian; Vieira, Tatiana; Abreu, Filipe; Campos, PedroCrowdsourcing in urban environments, geospatial annotation, social curation, and engaging citizens through social media applications and community-aware, place-based computing systems are at the forefront of pervasive urban technologies aimed at improving satisfaction, strengthening communities, and empowering citizens as stakeholders. This paper reports on the user-centered design of a holistic community engagement platform that combines the above aims and uncovers insights from both sides of the citizen-government divide for a people's GIS for enhancing urban livability.
- Co-designing personas for user experience and engagement in automationPublication . Abdelnour Nocera, Jose; Cabrero, Daniel; Campos, Pedro; Gonçalves, Frederica; Clemmensen, Torkil; Gissing, Robin; Nielsen, Lene; Saadati, ParisaThe aim of this workshop is to engage in co-design of personas to explore the interplay of autonomous technologies with user experi ence and engagement. Automating a process that is embedded into people’s everyday lives and activities will surely impact their expe rience. In a time where there is strong push towards more and more automation in our daily life, the workshop will explore the value of co-design in bringing to the fore the opportunities and issues of such trend on users’ experiences and engagements in multiple con texts such as work, health, entertainment and learning. Through the co-design of personas in future scenarios of automation the work shop will concretely identify valuable automation design goals for user experience and engagement drawing on participants’ knowl edge from industry projects and academic research.Tree concrete outcomes from the workshop are the following:
- Collaboration meets interactive surfaces and spaces (CMIS): walls, tables, mobiles, and wearablesPublication . Anslow, Craig; Campos, Pedro; Lucero, Andrés; Grisoni, Laurent; Augstein, Mirjam; Wallace, JamesThe CMIS workshop proposes to bring together researchers who are interested in improving collaborative experiences through the combination of multiple interaction surfaces with diverse sizes and formats, ranging from large-scale walls, to tables, mobiles, and wearables. The opportunities for innovation exist, but the ISS, CHI, CSCW, and other HCI communities have not yet thoroughly addressed the prob lem of bringing effective collaboration activities together using multiple interactive surfaces, especially in complex work domains. Of particular interest is the potential synergy that one can obtain by effectively combining different-sized surfaces and sharing information between devices.
- Collaboration meets interactive surfaces: a brief introductionPublication . Campos, Pedro; Ferreira, Alfredo
- Collaboration meets interactive surfaces: walls, tables, tablets, and phonesPublication . Campos, Pedro; Ferreira, Alfredo; Lucero, AndrésThis workshop proposes to bring together researchers who are interested in improving collaborative experiences through the use of multi-sized interaction surfaces, ranging from large-scale walls, to tables, tablets and phones. The opportunities for innovation exist, but the tabletop community has not still completely addressed the problem of bringing effective collaboration activities using multiple interactive surfaces, especially in complex work domains. Of particular interest is the potential synergy that one can obtain by effectively combining different-sized surfaces.