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. Author manuscript; available in PMC: 2009 Nov 6.
Published in final edited form as: Vision Res. 2003 Mar;43(6):617–627. doi: 10.1016/S0042-6989(03)00009-9

Fig. 4.

Fig. 4

Left panel shows contrast thresholds and model fits plotted as a function of ISI for a 71.6-year-old observer. Error bars denote ±1 SEM. Right panel shows corresponding IRF calculated from Eq. (1).