Table 1. DI as a function of BMI application, stimulus contrast, and time after stimulus onset.

	DI no BMI			DI BMI
Contrast, %	0-50 ms	50-200 ms	200-700 ms	0-50 ms	50-200 ms	200-700 ms
4	0.71 ± 0.33	0.76 ± 0.21	0.78 ± 0.19	0.44 ± 0.28	0.48 ± 0.27	0.47 ± 0.25
8	0.85 ± 0.17	0.79 ± 0.15	0.79 ± 0.15	0.49 ± 0.45	0.51 ± 0.36	0.59 ± 0.28
16	0.79 ± 0.16	0.79 ± 0.14	0.79 ± 0.15	0.54 ± 0.62	0.57 ± 0.38	0.60 ± 0.37
32	0.84 ± 0.16	0.89 ± 0.14	0.89 ± 0.14	0.57 ± 0.31	0.59 ± 0.27	0.64 ± 0.22
64	0.78 ± 0.23	0.81 ± 0.17	0.82 ± 0.17	0.46 ± 0.30	0.54 ± 0.29	0.57 ± 0.29

DI were largely independent of stimulus contrast and time after stimulus onset in the absence of BMI. BMI had significant effects on DI during all response periods.