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ISBN: 978-972-8939-25-0 © 2010 IADIScreated limitations on social affordances: even being bigger than the iPad, it does not suggest sharinginteraction, mainly because of the angle of screen viewing that is restrictive. The size of icons suggested theuse of the pen in the laptop mode (instead of tablet mode) on perceived affordances. The subjects alsoconsidered it “less strange than the iPad” taking into account its similarity with a tradicional laptop.The social affordance of iPad was mostly associated with the brand and social status. Some physicalaspects reinforce the idea of a valuable device. Recent phenomena like hyper-connectivity and technodependency,which can be still more present into the group of participants − Computer Science students −,were taken into account on social affordance and, once again, reflected on motivational affordances.Besides drawing, the tablet’s social and motivational affordances are repeatedly related to its formal andwork-related uses in classrooms, presentations and in taking notes. Relating it with the declared firstimpressions, the device can be seen as a more versatile laptop.The identified motivational affordances suggested that this concept should not be taken in isolation; itmay have direct consequences of the other three concepts of affordance, as exemplified below:• Physical: related to attractiveness and affection. Aesthetic, flexibility, portability (weight and size);• Perceived: associated to challenging, feedback: Invitation to use touch screen (or the pen), naturalinteraction, friendly user interface.• Social: related to identity, autonomy and social relations: prestige associated to the device or thebrand, identification of being a technical or digital arts working tool, sharing or not information.The current trends like using portable devices and ubiquitous technologies highlights the importance ofphysical affordances that the desktops do not have. Aspects like how to handle, carry or manipulate artifactsare critical to the technology acceptation and appropriation. The iPhone 4 ® is an example of the importanceto consider the physical affordance on design process. Holding the iPhone at the bottom left-hand cornercauses signal reception problem. This constraint frustrated users and compelled Apple to offer a special caseand to advise users to hold it in a different way.According to this analysis, the four different views of affordances were seen as important andcomplementary to understand and evaluate the first impression a person may have on exploring a newtechnology. Physical and social affordances are central to understand the main aspects that were noticed andperceived by the person, and as Sellen (2009) states, to understand several levels of interactions. Theperceived affordance is a warranty of understandability of the user interface. And the motivationalaffordances can help aggregating them, making it possible to understand how these affordances cancontribute to interaction being part of each person’s motivations and social interaction in the 3 rd paradigm .5. CONCLUSION AND FUTURE WORKThe 3 rd HCI paradigm brings a set of new challenges to the field, such as aggregating human values to theuser interface, but some aspects of the 1 st and 2 nd paradigms still need to be considered when designinginteractions. The perceived affordance is strongly related to some aspects of the 1 st and 2 nd HCI paradigmsthat must be preserved in designing interaction that makes sense to its target audience, creating technologiesthat are easy to use and easy to learn. The concept of motivational affordance seems to be suitable to the 3 rdHCI paradigm, once it is associated with human values and their desires and concerns, in a social, economic,and political ecology (Sellen, 2009).The concept of affordance has been applied to the interaction design in different ways since Norman’sfirst appropriation, and it has been transformed according to the technical and social contexts of usingtechnology in daily life. The observational study made it clear that different views of affordance may coexist,such as physical, perceived, social, and motivational affordances, and their correlation can beespecially useful to understand how the main aspects of a technology can be associated to each human’smotivation, an important mechanisms that drives humans’ choices.In continuity to this work, we intend to focus on motivational affordances, the way they correlate to theothers, how they might explain humans’ affective reactions, impacting on interface design and evaluation.190