Triangulation is often used to indicate that two (or more) methods are used in a study in order to check the results. "The concept of triangulation is borrowed from navigational and land surveying techniques that determine a single point in space with the convergence of measurements taken from two other distinct points." The idea is that one can be more confident with a result if different methods lead to the same result.
Triangulation is a powerful technique that facilitates validation of data through cross verification from two or more sources. In particular, it refers to the application and combination of several research methods in the study of the same phenomenon.
It can be used in both quantitative (validation) and qualitative (inquiry) studies.
It is a method-appropriate strategy of founding the credibility of qualitative analyses.
It becomes an alternative to traditional criteria like reliability and validity.
It is the preferred line in the social sciences.
By combining multiple observers, theories, methods, and empirical materials, researchers can hope to overcome the weakness or intrinsic biases and the problems that come from single method, single-observer and single-theory studies.
