...
If we don't randomize tasks, each participant will see the same tasks in the same order:
| Participant 1 | Participant 2 | Participant 3 |
|---|---|---|
| Task 1 | Task 1 | Task 1 |
| Task 2 | Task 2 | Task 2 |
| Task 3 | Task 3 | Task 3 |
...
If we do randomize tasks, each participant will get the tasks in a different (random) order:
| Participant 1 | Participant 2 | Participant 3 |
|---|---|---|
| Task 1 | Task 2 | Task 3 |
| Task 2 | Task 3 | Task 1 |
| Task 3 | Task 1 | Task 2 |
...