A set of research studies having the same objective but using procedures that differ substantially from one another. This has also been called the multi-trait multi-method approach, convergent validation, and methodological triangulation. By varying the approach, one hopes to identify and compensate for mistakes and biases. Eclectic research can be used to estimate parameters for econometric models and to assess their construct validity. Armstrong (1985, pp. 205-214) provides examples and evidence on its value.