software tools and framework for subliminal interventions

about how team papers app


Recent studies have shown that the subliminal influence of behavioral concepts may be a more effective approach to behavior change interventions.
These interventions can be used in various domains, such as breaking down the sedentary activity, promoting the safe use of the Internet among minors, promoting civil discourse and breaking down unwanted online habits such as excessive use of social networks.
In this project, we are focused on the study of new approaches to persuasive computing, strongly based on subliminal persuasion techniques that explore the power of the automatic mind for behavioral change.
One of the applications of this approach is to improve physical well-being and health.

The main challenges are therefore:
(i) to design and evaluate technologies that promote active aging, and
(ii) to promote a more inclusive society for the aging of the population, which are mostly technology-averse and have different needs from others segments of the population.

In light of these challenges, researchers need more knowledge about how to project for the "automatic mind" or what Richard Thaler and Cass Sustein call "nudging.”
There are currently inadequate methods for developing a substantial body of knowledge about nudge-mediated technology. Thus, the main objective of this project is to develop a set of software tools and a methodological framework for the delivery of behavioral change interventions using nudging.


There are essentially two main contributions that this project brings to the community and to society:
(i) it will provide a deeper understanding and conception for the long-term acceptance of Personal Health Informatics Tools (context 1) and Online Shopping (context 2), in particular exploration of automatic mind power, subliminal technologies based on Nudges
(ii) it will provide a software solutions for designing, experimenting, debugging, or replicating persuasive user interfaces based on nudges of different types or applications that demo these nudging techniques.

Within the area of ​​ICTs and Human-Computer Interaction, the technical and technological developments that the project will generate include, in addition to this API, a set of persuasive interface design and development tools. By itself, this is already a significant technological development. But we intend to advance the state of the art by introducing the possibility of creating and developing systems that make use of the automatic mind - as described in the state of the art - and which dynamically adapt to users' persuasion profiles. In this context, a parallel technological development, derived from the contributions mentioned above, will be related to the prototypes and systems that will be created using these development tools, including the API itself, and that will be tested and evaluated in behavior change induction contexts.


The projet brings together a multidisciplinary team composed by highly experienced software engineers, designers, UI and UX Professors and psychology academics.
Projet lead by innovative software agency wowsystems in partnership with iti - madeira interative techonlogies institute and psiprof psychology consultancy firm.


Beatriz Peres, Pedro F. Campos, and Aida Azadegan. 2019. Digitally Augmenting the Physical Ground Space with Timed Visual Cues for Crutch-Assisted Walking. In Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems (CHI EA '19). ACM, New York, NY, USA, Paper LBW1716, 6 pages. DOI:

Lígia Duro, Pedro F. Campos, Teresa Romão, and Evangelos Karapanos. 2019. Visual Quotes: Does Aesthetic Appeal Influence How Perceived Motivating Text Messages Impact Short-Term Exercise Motivation?. In Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems (CHI EA '19). ACM, New York, NY, USA, Paper LBW0139, 6 pages. DOI:

Ana Caraban, Evangelos Karapanos, Daniel Gonçalves, and Pedro Campos. 2019. 23 Ways to Nudge: A Review of Technology-Mediated Nudging in Human-Computer Interaction. In Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems (CHI '19). ACM, New York, NY, USA, Paper 503, 15 pages. DOI:

Peres, B., Campos, P.F., & Azadegan, A. (2019). A Persuasive Approach in Using Visual Cues to Facilitate Mobility Using Forearm Crutches. BCSS@PERSUASIVE.

Laís dos Santos Lopes and Pedro Campos. (2018). A Subconscious, Context-Sensitive Approach to Psycho-Physical Well-being. NordiCHI 2018 Workshop on mHealth and Psycho-Physical Wellbeing.


A first prototype app that highlights the outcome of the project is currently on the making.
Relying on a hedgehog that the user has to care for, it reacts and evolves as healthy and active behaviors or not.
Please find below some screenshots