Hi, I'm trying to understand particle polarization. To my understanding if a particle is in a pure quantum state with non-zero spin (i.e. spin up) then it is fully polarized. If it is in a superposition of different spin states then it is weakly polarized and if its properties are uniform in all directions then it is completely un-polarized. I feel like I'm missing something here because it seems to me that a particle with spin would be completely un-polarized and then become fully polarized upon measurement. How would you get a value in between? Sorry if this is a stupid question. Thank you for your time.