Mechanism is about understanding how and why something occurs: the steps and processes, which buttons were pressed, what screens viewed, what information was examined and how this all creates a larger phenomenon. It is essential to understand mechanism in order to draw lessons and make predictions that generalise and extrapolate beyond particular data and situations.
Used in Chap. 13: page 159
Also used in hcistats2e: Chap. 1: page 10; Chap. 10: page 122; Chap. 14: pages 166, 181, 182, 183, 184