Psychologists on the board may be better able to explain this. I understand that it is a well understood phenomenon that routine tasks (punching ATM pin numbers, scanning roads while driving, etc.) are glossed over by the mind and you may do things without remembering all the details.

I forgot the technical term but am hoping someone more knowledgeable can give pointers.

That said - thanks folks for reminding us about the variations in keypads. Is this related to different language scripts or cultural difference? What is the reasoning to move away from forces of standardization?