Maya just got a new puppy and also started wearing green socks more often. A few weeks later, she told her friend, "Ever since I started wearing these socks, my puppy has been extra playful!" Her friend laughed and said, "I think your socks and your puppy have nothing to do with each other." But Maya wasn't joking-she truly believed the socks had something to do with her puppy's behavior. She ... socks. So now, whenever she wears them, she expects her puppy to behave better. Is her brain making a real connection-or just imagining one? Take the quiz to find out what's really going on here.