Triangulation refers to the use of multiple methods in a particular research project or evaluation. The idea here is that the limitations of one approach are compensated by the strengths of another in such a way that a more complete and informative picture emerges of the area being addressed. Liamputtong Rice and Ezzy (1999) neatly summarise four types of triangulation:

  1. Data Source Triangulation, involving multiple data sources, information should be elicited from all the different interest groups or associations involved with the project being evaluated.
  2. Methods Triangulation, combining varieties of methods such as focus groups, telephone surveys and in-depth interviews
  3. Researcher Triangulation, using a number of different researchers in the evaluation to provide different perspectives
  4. Theory Triangulation, which draws on a number of theoretical perspectives to provide new insights.


Documentation Deciding on data collection methods