Randomized Experimental Study Is the BEST! Is it?

Considering different research methodologies as complementary is certainly more appealing rather than seeing them as adversary. Each research methodology serves particular functions that will not be effectively met using different research methodologies. For the purpose of justifying causal conclusion, randomized experiments are “the most efficient and reliable method” (Cook and Sinha, 2006, p. 563). This method, however, seems inappropriate for many other educational inquiries. Two examples, i.e. theories of change and design experiments, are delineated to describe the complexity of educational inquiries.