If anybody still doesn't understand, when the wave function collapses, that is called observation. Again, from Wikipedia:

In various interpretations of quantum mechanics, wave function collapse, also called reduction of the state vector, occurs when a wave function—initially in a superposition of several eigenstates—reduces to a single eigenstate due to interaction with the external world. This interaction is called an observation and is the essence of a measurement in quantum mechanics, which connects the wave function with classical observables such as position and momentum.

Physics has this problem with naming things. They use words like "particle", "observation", and "spin", among others, which are words that every English speaker knows, but then they use those words to describe stuff that's actually only similar to the words everybody knows. This makes physics a lot more approachable for people who know nothing, but then completely confuses people with only a little knowledge.