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Track not only where in the user interface people get stuck, but also how much help they need to get unstuck. … [M]ost of us are paying attention to the happy path as the optimum success in a task, but then have to take lots of notes about any deviation from that path. If you look at what the success and error conditions are as you design a study, you can create a list to check off to make data gathering quicker and less taxing as you’re doing both that and moderating.
Easier data gathering: Techniques of the pros by Dana Chisnell
