Tasks should avoid providing detailed descriptions.

Tasks may take a long time to complete, thus giving users more opportunities to demonstrate errors and contribute additional data.

Tasks should include a description of the goal of completing the task

Tasks should have a degree of ambiguity to encourage users to generate novel ideas for system features.

Tasks should be measurable, allowing for the collection of quantitative data

Tasks should provide the user with motivation for completing the task

Tasks, particularly in a laboratory setting, should avoid offering contextual information.

Tasks should not be ambigious.