Field researchers often use nonprobability samples, which means that they may take a smaller, ...

●   Time: A researcher samples time by observing a setting at different times—he or she observes at all times of the day, on every day of the week, and in all seasons to get a full sense of how the field site stays the same or changes.
●   Location: A researcher samples locations because one location may give depth, but a narrow perspective—sitting or standing in different locations helps the researcher get a sense of the whole site.
●   People: Field researchers sample people by focusing their attention on different kinds of people—old-timers and newcomers, old and young, males and females, leaders and followers.
●   Events: A field researcher also samples various kinds of events—routine, special, and unanticipated.