Fig. 5: Illustration of stimuli and experimental design.
From: Topographic numerosity maps cover subitizing and estimation ranges
a A full example stimulus as seen by the participants in the scanner. The dot pattern covered the central 4° (visual angle) diameter within an 10.2° diameter mean-luminance (grey) field. A large, thin, red fixation cross passes diagonally through the centre of the display, and through the centre of the dot pattern. Participants fixated at the intersection of the cross. b Example numerosity stimuli, where the total surface area of the dot pattern is constant across numerosities. c The sequence of the numerosity stimuli presented to the participants at the small and large ranges, respectively.
