Cave Diver or SonGoku might be better resources, but as far as I know, collapsing the wave function is more a mathematical thing.
The collapse of the wavefunction and what it means pretty much depends on what you think of the wavefunction itself.
In truth there are strong arguments both against
(a) Taking an entirely non-realist view, that it is just a mathematical thing
and
(b) Taking a totally realist view that collapse is an actual physical process which occurs literally.
Of course there are several things to suggest that there are elements of both in collapse.
First of all "observation" or "measurement" in quantum mechanics means one thing, a quantum object leaves a trace or evidence of some of its properties in a large/classical object. The large classical object can be a measuring device in a lab, it can be a cloud of gas, it could be the retina in the back of the eye or it could be a stone. Measurement is a quantum-classical interaction.
Of course this leads into all the issues you normally hear about.
Why does interacting with classical objects cause quantum objects to restrict their possibilities(to use loose language)? This is the wavefunction collapse question.
Also, when does something count as a classical object?
Is dividing the world into quantum and classical things not totally artificial?
For some more info perhaps my old posts will be of help:
EvC Forum: Quantum physics: Copenhagen vs decoherence interpretations