Please clarify the Observer effect in quantum physics for me.
Is it true that the results of the double-slit experiment with detection of particles at one of the slits collapsing the wave-function depend on whether observer is in the room or not. If the observer is not in the room and the results of the detector are not recorded somehow the wave function is preserved despite detection of particles at the slits by non-conscious detector.
If it is the case, have experiments been conducted to identify whether the observer has to be somehow qualified to understand the contents of the experiment to result in the collapse of the wave function?
Is there a lab open to the public where this mechanism can be observed?