As someone that works troubleshooting stuff, I've seen a surprising amount of people that, when confronted with messages, warnings and errors, tend to seek help fast (or early in the process) in the ...
Wikipedia gives a good explanation of how activity theory works. I have a query for finding an object in an activity. The object is the objective of the system. Can reason with situation be ...
After reading the question What is the impact of showing the amount of unattended notifications to the user, it occurred to me that many notifications (certainly not all) are red, two examples being ...