For measurement with "add an image", we are going to cleave closely to the same research questions, measurements, experiment plan, and leading indicators as for "add a link" in the "Add a Link - Measurement Specification" document. This task and its subtasks contain the full set of instrumentation needs.
For users who have the Homepage enabled, we want to capture their user ID along with the information below whenever they interact with an "add an image" task.
- Distinguish by wiki.
- Analyze how much time elapses between each action.
- Know whether each action was taken from desktop or mobile.
- Know which article the user is on (through page title and page id).
- Include timestamps with millisecond precision.