I was in a non-technical lecture last week (on entrepreneurial idea generation) and the lecturer wanted to show us a video to kick off our session. (It was actually an amazing Steven Johnson video, Where Good Ideas Come From.)
What interested me, probably on par with the video, was the way the lecturer tried to get the volume fixed to play the video.
She was setting up the laptop, got to the Youtube video, and said, before starting, “the trickiest thing about playing videos in lectures is getting the sound to work usually.” So we can deduce that this is a problem she has usually.
She made sure the laptop’s volume was turned up – she was fine with that. Then it came to the volume on the Youtube video. When you hover over the volume button this is what you see:
The volume control rolls out (as it should, to hide unnecessary parts of the UI to make it less complex), and the tooltip you see says “Mute”. The lecturer made sure the volume slider was knocked all the way up to 100%.
And here’s where she got confused. She clicked on the volume button.
Everyone in the lecture theatre (largely just 20 year old students, all bought up with the Youtube interface) blinked at her, a little confused. Someone said “You need to click the volume button again, to unmute it.” And she said “but then the tooltip says that it’s muted…”
What had happened was that she saw the tooltip and read it as the current state: “Mute”. So clicking it again would change the state to unmuted, in her mind. It completely make sense, if you think about it. The tooltip here, being both a verb and an adjective, makes its action ambiguous.
All of the YouTube interface uses verbs as the tooltip, so you’d think that would have made it obvious that the ‘mute’ text was also a verb. But it looks like that isn’t enough to be completely obvious.
Maybe tooltips should be more descriptive.
