This paper presents a design approach tackling the transformation of behavior through 'interactive materiality' from a phenomenological perspective. It builds upon the Interaction Frogger framework that couples action to reaction for intuitive mapping in intelligent product interaction. Through the discussion of two researchthrough-design cases, the augmented speed-skate experience and affective pen, it highlights the opportunities for design of an action-perception loop. Consequently, an approach is suggested that defines three steps to be incorporated in the design process: affirming and appreciating current behavior; designing continuous mapping for transformation; and fine-tuning sensitivities in the interactive materiality. Thereby, it discusses how behavior transformation through interactive materiality derived from a theoretical level, can contribute to design knowledge on the implementation level. The aim of this paper is to inspire design-thinking to shift from the cognitive approach of persuasion, to a meaningful and embodied mechanism respecting all human skills, by providing practical insights for designers.

The covid-19 pandemic has severely limited the possibility for people to meet physically, which forced many individuals and organizations to employ online meetings as their predominant mode of communication. A potential problem with the unprecedentedly central role of online meetings in a wide range of everyday activities is the disruption it may cause to intersubjective experiences, an intuitive mutual understanding of the participants and their thinking of themselves as a group, a "we". To address this problem, about half a year into the pandemic we conducted an exploratory study, in which the informants (N=36) completed a survey, comprising a set of Likert scales and open-ended questions focusing on "team spirit", moment-to-moment coordination, emotions, and the sense of presence in online and physical meetings. The results indicate that online meetings may present particular challenges regarding the experience of "we-ness", and different types of online meetings can be experienced differently. Implications of the results for further research are discussed. CCS CONCEPTS• Human-centered computing → Collaborative and social computing; Empirical studies in collaborative and social computing.

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Driven by a critique of Ishii et al's recent vision of Radical Atoms we call for a debate on the different conceptual paradigms underlying the TEI community and its activities. TEI was initiated to share and connect different perspectives, but we feel conceptual debate is lacking. To fuel this debate, we start with comparing two paradigms by examining the Radical Atoms proposal and balance it from our design-led perspective. Our aim with this paper is to revive the richness of TEI's multidisciplinary approach.

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