User blog:Supernova544/Supernova's spawning theory

Some people think mobs are attracted to the players position. Others believe they are attracted to polymer and light blocks. But I have thought and (if I'm right) discovered the truth behind the spawning. I believe the spawn when you load a new chunk. I think this because I was in my world and I loaded an area and saw some mobs that weren't there before" Please note that this is just a theory and I have not proven this as fact yet, however I would appreciate it if you helped me by testing this in your worlds (I'll give you some credit, too).

Edit:This Has been proven, thanks to Mrob27 for helping to prove this.