Quick Answer. In some rare cases, excessive stress causes bleeding between periods. It is more common that another condition is responsible, such as pregnancy, polycystic ovary syndrome, infection, pelvic inflammatory disease or side effects of medication, according to WebMD.
Using the scientific method, you can repeat the experiment to find out for yourself whether or not the other researcher's assertions are true. This is a key factor that separates science from dogma! The other important part of scientific research is that a hypothesis must be falsifiable. A falsifiable hypothesis or theory is one where an experiment or another discovery can prove it to be wrong, untrue, and false.
Design for the conduct of scientific research in education. The committeeâs discussion of research design is developed around three themes: 1. A variety of legitimate scientiï¬c approaches exist. Research designs. evolve, as do the questions they address, the theories they inform, and. the overall state of science.