Table 3.

Number and proportion of initial passes through the place field resulting in cell firing as a function of the number of objects explored by the rat before cell firing

Number of objects explored	0	1	2	3
Sighted rats	8/10	20/23	9/10	7/7
	(80%)	(87%)	(90%)	(100%)
Blind rats	0/13	12/20	15/20	19/19
	(0%)	(60%)	(75%)	(100%)

Because the analysis was halted when the cell was found to fire in the field, only a few passes after visits to two or three objects were counted in sighted rats. A single path could contribute several times to the numbers given in the table if a first (or any subsequent) pass through the field did not result in cell firing.