Can someone summarise what is the currently accepted interpretation of how measurement affects the interference pattern in a double slit experiment? (Answers which say things like 'the electron knows if it is being observed' are not acceptable - :-) ) To quote from the PF rules, I'm looking for "the current status of physics as practiced by the scientific community", with regards the double slit measurement thing. The general internet is full of so many crank opinions on this and the literature is far too big and also full of speculative nonsense. There must be someone here who has the right description and is able to summarise succinctly? I have my own explanation, which I'm hoping is the majority view among people of good sense. Thanks!