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A top-down view of the experimental setup. (A) denotes the location of the aperture. (B) represents the location of the observer (95 cm from the center of the aperture in experiment 1; 152.4 cm from the center of the aperture in experiments 2 and 3). (D) represents the location of the experimenter relative to the observer and aperture, and (C) is the tape measure that was adjusted in either direction to match the size of the aperture (A).
