Between the Tag and the Screen - Arkitektur- og designhøgskolen i ...

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Between the Tag and the Screen - Arkitektur- og designhøgskolen i ...

5 B C H A P T E R 3 : M A I N A P P R O A C H E S A N D M E T H O D Sdeveloping SR-RFID. An example of a breakdown in the design process is,for instance, when a prototype did not behave as expected. A focus shiftcould happen when there was discussion of an application in the group, andattention was shifted to what the applications told us about SR-RFID.3. Deconstructing SR-RFIDIn the first attempts to investigate the technology, we mapped fullinteractions on RFID-enabled mobile phones. This included diagrammingvarious input methods in addition to SR-RFID and the various outputs relatedto mobile phones. However, the process proved ineffective given the verylarge number of variables.Later in the study, when the near-fields had been identified as a frame forinvestigation, we limited our attention to near-field-only primitives. Theattention also shifted from an orientation on input primitives to formprimitives. Input primitives may be seen as the small pieces of interaction auser may perform (Rohs & Zweifel, 2005). For instance, this may concernmoving a phone into a field. In contrast, the form primitive is material-centricand focuses on the different forms a material can provide that may eventuallylead to the mediation of user experiences (Nordby, 2010).The shift of focus underlines our material approach to the technology. Wherethe term interaction primitives mostly refers to dynamic properties of amaterial, form primitives acknowledge that the material consists of bothdynamic and static variables, which may be used to shape the final artefact.Thus the form primitives expand our focus to the entire range of materialproperties, and not just the ones related to interactions.4. Creating modelsCreating models has been important in this study as a way of mappingdifferent aspects of SR-RFID. Such models have been used extensively inHCI research, for instance in mapping interactions on touch screens (W.Buxton, 1990) or interface widgets (Chen, 1993). The models were createdby a process of extensive sketching and diagramming of the dynamicrelations between different properties of SR-RFID. One example of suchdiagramming is the RFID-driven tap and hold model that shows how twointersecting fields may be interpreted in different ways (Nordby & Morrison,2010). Other examples are the descriptions of multi- and single-field inputtechniques (Nordby, 2011; Nordby & Morrison, 2010).5. Documentation of SR-RFID-related phenomenaBy tackling design problems, it was possible that novel ways ofunderstanding SR-RFID could appear throughout the design process. Thus,the data collected comprised a range of descriptions of interaction techniquesand notes related to SR-RFID-related observations. The data from the design51

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