INF 131

affordances - the desired action should be possible; human-centric; the functionality is there that people want; system affords typing and selecting - Ex: to click on the link agile interaction design - prototypes developed rapidly feedback is solicited revisions are made feedback are taken again Behavioral Level of Processing - - Trained actions, largely subconscious - Ex: we don't think about brushing our teeth while brushing because we've done it enough time. It's already started you dont have to think about it; When you press a specific button to capture a target Behavioral level of processing - Specify & Interpret Bounded Rationality - - Human are sort of rational - Generally we act in our own best interest - But we don't always know what our best interests are - Specifically, rationality is limited by: information cognitive abilities time(not enough time to consider all the options) We "satisfice" : we tried to pick the best option, we ended up picking the good enough action closure - objects are perceived as being whole even when they are not complete Ex: seeing 2 triangles even though they are not complet Common fate - things that move in the same direction are perceived as a group Conceptual models - a good designs communicate a clear and practical understanding of how the system works. - Ex: oven and stove knob one; stove weak - strong; oven temperature oriented Conscious - - Slow