Can some one share references that how much minimum and maximum time duration is required to conduct or apply experimental research design in Educational Research.
I agree with David Coker . It really depends on your context. One of my publications relates to an educational method that was implemented for nearly 20 years. Most doctoral study research is limited by the length of the degree course (usually 3 years) and the need to write a proposal and gain ethics approval before starting then write up findings at the end.
okay thanks for the reply Actually we are working from the last 13 years but how much time experimental study required in education for experimental design. This is specially relevant to the study of quasi-experimental design. Which require observation than treatment and than observation. Hope now the question will be clear and I will get the relevant answer.