FIGURE 4. Interactions and local fields in networks of different size.

a, Greyscale density map of the distribution of effective interaction fields experienced by a single cell h_i^int versus its own bias or local field h_i (see the text); distribution formed over network configurations at each point in time during a natural movie for n = 1,140 3-cell groups (top panel) and n = 250 10-cell groups (bottom panel). Black line shows the boundary between dominance of local fields versus interactions. b, Mean interactions J_ij and local fields h_i describing groups of N cells, with error bars showing standard deviations across multiple groups. c, Pairwise interaction in a network of 10 cells ⁽¹⁰⁾ plotted against the interaction values of the same pair in a sub-network containing only 5 cells ⁽⁵⁾. Line shows equality.