Table 1.

Neuronal selectivity for different task factors in a three-way ANOVA (evaluated at α = 0.05) on firing rates during sample and delay period

ANOVA factor	Sample	Delay	Sample and delay
Number	26.7% (134)	30.5% (153)	12.8% (64)
Exclusive number	19% (95)	18.2% (91)	7% (35)
Protocol	10% (50)	5.2% (26)	1% (5)
Shape	10.2% (51)	18.6% (93)	3.4% (17)
Number and protocol	3% (15)	1% (5)	0% (0)
Number and shape	3.8% (19)	10.8% (54)	0.8% (4)
Protocol and shape	2% (10)	1.2% (6)	0.4% (2)

Percentages of overall recorded units (n = 501 neurons).