Data triangulation, which entails gathering data through several sampling
strategies, so that slices of data at different times and social situations, as well as
on a variety of people, are gathered.
Investigator triangulation, which refers to the use of more than one researcher in
the field to gather and interpret data.
3. Theoretical triangulation, which refers to the use of more than one theoretical
position in interpreting data.
4. Methodological triangulation, which refers to the use of more than one method
for gathering data.