Who does the narrator think is crazy in her home

The narrator says at one point, “I thought every house had to have its crazy woman or crazy girl, every village its idiot. Who would it be at our house? Probably me.” The narrator thinks that she is crazy because she “hear[s] voices in motors and [sees] cowboy movies on blank walls.” Whether these things are ghostly visions or manifestations of her creativity, they certainly make the narrator abnormal. Because she feels she does not belong, the narrator sympathizes with the insane; she does not know what it is like to lose one’s mind, but she at least knows about feeling ungrounded.