Visual memory has a different character than verbal memory. This episode examines the nature of our visual memory, and how it is used in such games as Tetris, Carcassonne, and any game that has a map that your character must navigate.
Kosslyn, S. M., Ball, T. M., & Reiser, B. J. (1978). Visual images preserve metric spatial information: Evidence from studies of image scanning. Journal of Experimental Psychology: Human Perception and Performance, 4, 47-60.