Web-based The intervention entailed the use of the World Wide Web.
Whole class The intervention was delivered to the entire class as single social unit. For example, the intervention came in the form of a traditional lecture.
Written communication skills Outcomes were coded as written communication skills if the results specifically mentioned that the communication skills (i.e., the ability to communicate effectively) were written communication skills, if not, then the outcome was coded as the more general communication skills category.