The Power of Prediction by Jared Spool:
In our experience, it stands out even more when the participant gets stuck someplace nobody expected. These opportunities allow us a chance to learn something new about how users approach our designs.
Great idea. As I discussed in, Management is Prediction:
Personally I have found the act of actually making predictions and examining the results incredibly helpful in improving the speed and depth of my learning. You can also learn tendencies for missed predictions (predicting greater improvement, prediction faster adoption of new idea, underestimate additional costs required by new procedures…) and then adjust to make better predictions over time.