What are the different types of experimental research methodologies use in science researches?

Question

What are the different types of experimental research methodologies use in science researches?

Answer 1

s***w up first and find out later what went wrong.

Fly high with theories and math and never land.

Trial and error.

Scientific Method.

Answer 2

Method or design? The common ones are complete random (CRD) with/without replacement and random block (RBD) with/without replacement. A-B is like Single-shot design in experimental research for education. A-B-A is like Pre-test/Post test.