Table 3. Average number of neighbors of the same type.

type	experiment 1			experiment 2
	exper.	mean	SD	exper.	mean	SD
cooperator	0.0000	0.0946	0.2383	1.3333	0.3905	0.2740
cond. coop.	5.8560	5.9048	0.0819	4.1758	4.2855	0.1438
defector	1.6585	1.9163	0.2353	2.9565	3.2404	0.1823

The column exper. lists the average number of neighbors of the same type for the three types of players, computed, for each type of player, as the sum of pairs of neighbors of the given type divided by the number of players of that type. The columns mean and SD list the means and standard deviations of the values obtained in 1000 random shufflings of players.