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Which clippings match 'Perceived Affordance' keyword pg.1 of 1
15 JUNE 2014

Lost in Translation: The Problem with Email

"'If you think of culture as just kind of the sum total of the relationships that colleagues have with each other, the thing about email is, it does literally nothing to build those relationships and is more likely to actually damage whatever connective tissue there is in the first place,' says Bryant.

Maybe it's time to pick up the phone. Or better yet, try stopping by someone's office to have a quick chat. It's amazing how much more polite and understanding people are when they're not hiding behind a keyboard."

(Adam Bryant, The Big Think, Inc.)

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CONTRIBUTOR

Simon Perkins
18 NOVEMBER 2013

Affordance, Conventions and Design

"Physical constraints are closely related to real affordances: For example, it is not possible to move the cursor outside the screen: this is a physical constraint. Locking the mouse button when clicking is not desired would be a physical constraint. Restricting the cursor to exist only in screen locations where its position is meaningful is a physical constraint.

Logical constraints use reasoning to determine the alternatives. Thus, if we ask the user to click on five locations and only four are immediately visible, the person knows, logically, that there is one location off the screen. Logical constraints are valuable in guiding behavior. It is how the user knows to scroll down and see the rest of the page. It is how users know when they have finished a task. By making the fundamental design model visible, users can readily (logically) deduce what actions are required. Logical constraints go hand–in–hand with a good conceptual model.

Cultural constraints are conventions shared by a cultural group. The fact that the graphic on the right–hand side of a display is a 'scroll bar' and that one should move the cursor to it, hold down a mouse button, and 'drag' it downward in order to see objects located below the current visible set (thus causing the image itself to appear to move upwards) is a cultural, learned convention. The choice of action is arbitrary: there is nothing inherent in the devices or design that requires the system to act in this way. The word 'arbitrary' does not mean that any random depiction would do equally well: the current choice is an intelligent fit to human cognition, but there are alternative methods that work equally well.

A convention is a constraint in that it prohibits some activities and encourages others. Physical constraints make some actions impossible: there is no way to ignore them. Logical and cultural constraints are weaker in the sense that they can be violated or ignored, but they act as valuable aids to navigating the unknowns and complexities of everyday life. As a result, they are powerful tools for the designer. A convention is a cultural constraint, one that has evolved over time. Conventions are not arbitrary: they evolve, they require a community of practice. They are slow to be adopted, and once adopted, slow to go away. So although the word implies voluntary choice, the reality is that they are real constraints upon our behavior. Use them with respect. Violate them only with great risk."

(Donald Norman)

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TAGS

affordancesconceptual modelconstraintsconventionscultural concept of technology • cultural constraints • cultural conventions • cultural group • design modelDonald Norman • guiding behaviour • human behaviourlearned behaviour • learned convention • logical constraints • perceived affordance • physical constraint • physical constraints • real affordancesreasoningshared practices • voluntary choice
20 JULY 2011

Knallerfrauen: Das neue iPad (chopping board)

"Das neue iPad, Ältere Herrschaften haben oftmals mit neuerer Technik ihre Probleme." © SAT.1

[Humorous scene where Martina Hill discovers her father (played by Claus Dieter Clausnitzer) using her present of a new iPad as a chopping board – where he has misunderstood what the purpose of the iPad is.]

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TAGS

71 Comedy International • absurd situationsaffordances • Claus Dieter Clausnitzer • comical situation • cooking • cultural significance of objectsdesign of everyday thingsdeviceeveryday lifefather • German comedy • German televisionhumouriPad • iPad chopping board • kitchen • Knallerfrauen • making sense • Martina Hill • misunderstandingnew technologyperceived affordancephysical capabilitiespreparing a mealreal affordancessensemaking • situation comedy • sketch comedytechnology affordancesuseful significance

CONTRIBUTOR

Simon Perkins
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