Experimental or study tasks are the actions that users are specifically asked to perform. Measurements such as task completion time can be observed and recorded. Tasks can be manipulated to gain statistical power using the noise-effect-number triangle.
Also used in hcistats2e: Chap. 13: pages 153, 158, 160, 162; Chap. 14: pages 174, 178, 179, 180, 182
Used in glossary entries: noise–effect–number triangle, statistical power, task completion time