: How important is the visual flow of an interface? I recently had a conversation with a friend about the design of an installer application. I pointed out that its visual flow was confusing.

@Goswami567

The visual flow of an interface does matter, and here's why:


Every interface screen should have a primary action or actions that are to be performed. The visual flow should naturally draw the eye to the primary action.
The less distance the eye has to travel, the easier an interface is to comprehend and use. Studies (pdf) on form design bear this out as forms with top-aligned labels are more quickly completed than forms with left- or right-aligned labels.
A confusing or extended visual flow increases user frustration. As they weigh the perceived cost of continued frustration and time versus accomplishing a task, many users will abandon the task.
The more abandoned tasks, the fewer conversions. In your friend's case, that means fewer installs. In short, he's hurting his bottom line by ignoring good design.


One of the best resources I've seen on this topic is a video series by StomperNet (ignore the sales pitch, the videos are worth putting up with it). The focus of the videos is to improve website conversions, but there are a lot of solid design principles with a scientific basis in them that could be applied to any design.


Video Part 1
Video Part 2
Video Part 3
Video Part 4


If video isn't your thing, check out this study, Identifying Web Usability Problems from Eye-Tracking Data (pdf), which highlights specific usability problems that stem from a poor visual flow.

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