Table 2.

Performance in attentional challenge tests: percentage of trials with first response correct

Challenge	Control rats	Lesioned rats
Target duration
0.50 sec	78.5  ± 2.2	80.0  ± 2.4
0.25 sec	77.1  ± 3.2	67.6  ± 1.4
Distracter
No distracter	76.1  ± 4.2	74.0  ± 4.1
Distracter	72.4  ± 4.6	66.3  ± 4.8
Ready signal variability
Constant, 5 sec	76.0  ± 3.8	74.5  ± 4.2
Variable, 1 sec	50.0  ± 3.5	36.4  ± 3.2
Variable, 5 sec	80.3  ± 4.7	66.9  ± 4.2
Variable, 9 sec	74.5  ± 3.6	57.5  ± 4.1

Values are mean ± SEM.