Table 2.

Trends in J_avg, h_avg, and h_avg^int (20 ms bin)

Data type	Variable	F_actual	F_crit	df
All data, pooled	J_avg	5.91*	2.85	3, 39
	h_avg	7.65*
	h_avg^int	2.54
Spike data only	J_avg	2.46	3.16	3, 18
	h_avg	2.94
	h_avg^int	1.54
LFP data only	J_avg	7.31*	3.07	3, 21
	h_avg	8.92*
	h_avg^int	2.23

The interactions J_avg and local fields h_avg, h_avg^int change in strength as ensemble size is increased from 4 to 10. Interactions (J_avg) and local fields caused by cells outside the ensemble and intrinsic firing tendencies (h_avg) moved toward zero with increasing ensemble size (Fig. 6). However, local fields caused by cells within the ensemble (h_avg^int) became more negative. Significant changes at the p < 0.05 level are indicated by an asterisk. Table shows only data binned at 20 ms.