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- The "Read something interesting" task initially confused some users. some users didn't realize the first task was asking them to try to scroll down or expand items. Changing the description to "Find something interesting to read" resolved this.
- Some users did not realize that the page was meant to be scrollable. We tried to afford scrolling by displaying a partial line of content at the bottom edge of the paper, but some users didn't recognize the mobile app functionality we were trying to describe.
- Originally, we didn't display a "Shrink" button on expandable content, and users tried to touch outside the content to get back. Users noticed the "Expand" button and successfully clicked on it to expand items to see the full version. However, in some of the original tests we didn't draw a shrink button and users tried clicking outside expanded items to get back, similar to how you close a photo on Facebook. Some users did this even after we started showing the "Shrink" button - we could consider making clicking outside of an expanded item shrink it, though this could be another issue that comes up with a paper prototype.
- One user wanted to share items across services. A couple of users hit the "Share" button, which took them to the canonical URL of the item (its imgur page, the e-mail in the Gmail interface, the post on Facebook, etc). Ideally, we could choose a reasonable default mode of sharing so that the user wouldn't have to take further action. There is always However, one user wanted to share several items, and expressed interest in being able to share these items outside of their "default" modes. This reminded us that there is definitely the possibility that the user wants to share between services or out-of-band, though.
- Some users thought the interface was busy, and they suggested hiding buttons. When the interface is on a real screen we can better determine whether the blow to learnability makes sense.
- For the most part, users did not encounter significant roadblocks. Users were familiar with interfaces that present a list of items to read, so use of our reading interface was generally straightforward.
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