We change a system by observing it but interpretation isn't part of it. The wave particle duality of a photon is the easiest way to see this. Below is an article which, to some extent, demonstrates what a part of what you are saying.

http://news.sciencemag.org/sciencenow/2007/02/16-04.html?etoc&eaf

This one is equally interesting, has to deal with interpretation and more philosophical.

Is Death The End? Experiments Suggest You Create Time

The heisenberg uncertainty principle applies to momentum and position. If you know the momentum of an object you have no idea of its position and vice versa. The greater a grasp of one value you have the lesser grasp of the other.