survey) triangulation = combine different research methods for a study in order to get the richer data.
observation: an the researcher it is important to protect the participants, not violating any rights (E.G. privacy). it is important that the researcher obtains the informed consent of the people being observed.
-the researcher is obligated to inform the participant about the observation; show the location the participant will be observed in and after completing the study, the researcher debriefs the participant about the findings. case study: in a case study, the researcher often obtains deeply personal information. Eventually, these personal informations may be published or written as a researcher report. and so it is important that the researchers protect the identities of their participants.