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Research Events
A research event is anything that is programmed to happen during a study. There are three major kinds of events.
Treatment Events (also called Interventions or stimuli).
Treatment events are of central importance in experimental designs. (Not in involved in a typical survey, including this poll).
Measurement Events.
These are actions taken to learn about the attitudes, beliefs, and behavior of the populations under study. In a survey, measurement events are usually questions.
Support Events.
These are strategically placed actions that make ready, facilitate, guide, or otherwise manage a study.
Null Event
A Null Event is a place holder where nothing happens deliberately. The purpose of inserting null events is to fill the time intervals in which other groups are presenting measurements or treatments. This aligns the events in one group with events in another, thereby controlling for the effects of history.