1 The seminal work on the figure-ground relationship is “Synoplevede Figurer” [Figure and Ground] by Edgar Rubin, Gyldendalske, 1915, translated and reprinted in Readings in Percep-tion by David C. Beardslee and Michael Werth-eimer, D. Van Nostrand, 1958, p. 194–203.

2 “Lower Region: A New Cue for Figure-Ground Assignment” by Shaun P. Vecera, Edward K. Vogel, and Geoffrey F. Woodman, Journal of Experimental Psychology: General, 2002, vol. 131(2), p. 194–205.

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