Table 1.

Results of the two-way ANOVA for five example number neurons shown in Fig. 2 C–G

Preferred numerosity	ANOVA (Firing rate ≈ stimulus type * numerosity)
	Numerosity	Stimulus type	Interaction
num1	F(4,251) = 5.7273, P < 0.001	F(2,251) = 0.9275, P = 0.396	F(8,251) = 1.2411, P = 0.273
num2	F(4,253) = 3.5881, P = 0.007	F(2,253) = 0.2355, P = 0.79	F(8,253) = 0.454, P = 0.887
num3	F(4,496) = 5.8789, P < 0.001	F(2,496) = 0.1179, P = 0.889	F(8,496) = 1.4538, P = 0.173
num4	F(4,308) = 4.2385, P = 0.002	F(2,308) = 0.1141, P = 0.892	F(8,308) = 0.9124, P = 0.506
num5	F(4,355) = 13.4938, P < 0.001	F(2,355) = 1.832, P = 0.162	F(8,355) = 0.3219, P = 0.958

Preferred numerosity: numerosity eliciting the strongest response. ANOVA results (F statistics and P value) for the factor “stimulus type” (“radius-fixed,” “area-fixed,” or “perimeter-fixed”), “numerosity” (numerosity one to five), or interaction between them.