Tuesday, March 27, 2007

Cogito Ergo Nomics

Needing a car that is easy to use ...

"How easy is your car to use? I'm not talking about acceleration, steering or cornering. I'm talking about the mental effort required to successfully interact with your car’s secondary features, such as in-car entertainment or the trip computer. While controls like steering (the brilliant simplicity of a wheel), throttle (foot pedal farthest to the right) and braking (second-to-right pedal) are standardized for most vehicles certified for use on a public road, the majority of other controls are confusing enough to plunge an automotive reviewer (or a Hertz Platinum Club member) into RTFM rage.

Sometimes it’s a simple matter of old habits dying hard: in many ways the best interface is one you don't have to re-learn. If you're used to having to jab at a button several times to adjust the temperature several degrees while surveying the change on a display that’s located on the opposite hemisphere of the dash, that may be the best user interface—for you.

But that’s not the whole story when something as basic as starting the car has now taken on innumerous forms. Do you A) insert the key in a slot (to the right or left of the steering wheel or in the center console) and turn it or B) insert the key in a hole and push it or C) insert the key into a slot and push a start button or D) ignore the key altogether as long as it's on your person and then either push a button or twist a piece of plastic adjacent to the steering wheel? Each of these methods are used by at least one current production car—and I’m sure I’ve missed at least one type of ignition sequence.

Changing gears is a similar issue. If you want to upshift using an automatic transmission with a shift-it-yourself mode, do you tap the shifter forward, backward or to the right? Or do you use buttons on the steering wheel? If you use steering wheel buttons, do you push the button on the right to upshift or on the back to downshift and the front to upshift? Or does the car instead use paddles behind the steering wheel? Which paddle do you use? Do you push or pull? And in case you want to shift while turning, do the paddles rotate with the steering wheel or are they stationary?

Even something as simple as automatic door locks come complete with their own set of usability issues. Do they lock when you put the car in Drive or when you reach a preset speed? Do they automatically unlock when you put the car back in Park? Do they automatically unlock when you pull the interior door handle, and if so, in the back seat or just the front? How do you disable them? Can you disable them? Can you even answer these questions about your own car?

Clearly, usability and interface design principles are taking a backseat to aesthetics and automakers’ oddly conflicting compulsions to be both trendy and unique. The problem is compounded by the unprecedented numbers of features being added to new cars, such as satellite radio and navigation, iPod integration, DVD players, Bluetooth cell phone connections, four-zone climate control, OnStar, heated and cooled massaging memory seats, etc. Without well-thought-out ways of interacting with these new features, the result is anarchy. I’d like to know how many times BMW Assist has been summoned by X5 drivers who thought they were opening their sunroofs, since the corresponding buttons are poorly marked, nearly identical, and adjacent to each other in matching wells, for no apparent reason other than BMW’s ever-questionable ideas regarding aesthetics."    (Continued via The Truth About Cars)    [Usability Resources]

Power Switch - Usability, User Interface Design

Power Switch


Anonymous Anonymous said...

to push or pull dilemmas, her is an example of a misplaced affordance


7:27 AM  

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