It is the theory which decides what can be observed. Albert Einstein (1879–1955) BUT it is ALSO TRUE If you change the way you look at things, things you look at change. Max Planck (1859-1947) 1 INTRODUCTION—RESEARCH IS CONTEXTUAL Why do we do research? Because we have a desire to understand the world around us, in particular our innate psychological need to want to know, with certainty, the cause behind the things we see. Certainty, however, is an elusive concept, as Heisenberg has shown.