I'm thinking about using a headmounted GoPro to do some usability testing on a tablet combined with the Think Out Loud protocol (a poor mans version of Eyetracking). Are there any obvious hinderings that any of you are aware of that I should be concerned about? Audio, batterylife, discomfort with headmount etc etc.?
Considering the price of any Tobii headtracker unit, I can conduct several usability tests with a GoPro for the same amount of money.
UPDATE (POST GoPro test):
This is what I learned from using a GoPro in a usability test:
- The camera recording 1080p with 30fps works great! Clear images and decent battery-life (~2h)
- Even though it doesn't work as eyetracking, the combined recordings of talk-out-loud audio and hand-gestures yielded plenty of problematic aspects in our system. Problems now documented in HD = proof to the programmers!
- Since the GoPro I used had a WiFi connection, I could mount the camera on my test-subjects, and then use the GoPro app on my smartphone to adjust the cameras angle by LiveView'ing the camera on my smartphone. This meant that ALL my recording were near perfect in angle.
- The GoPro seems really ruff and ready for this type of work. It's very robust and sturdy, and seems like a more durable piece of field-testing equipment than most eyetracking devices.
- Buy a >16GB Micro SD for the camera - 1080 quickly takes up a lot of memory
- Beware of audio! The camera in a headmounted case has poor audio. Either get a skeleton-case, an external mic, or cut a hole for the mic in the standard protective case (my solution because it's cheapest - ruins the water resistanceness).
- Avoid background noise. The cameras software automatically turn up mic sensitivity when there is silence - so when audio re-appears there is a high chance of clipping. But no audio was lost in my tests.
- Screen-reflections. The test I conducted was of an app on a tablet. Way too often the tablet screen reflected the blinking red button on front of the GoPro, which could spoil recordings if it is small details you are looking for.
I would absolutely use the GoPro again for a exploratory usability-test. It yields tons of documented user screw-ups in HD, which can teach you tons of things about how the user uses the system in real life, plus when and how they make mistakes. A potential UX goldmine. Can't wait to test this on people out in the actual field, on site, to get even more ecologically valid data.