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. Author manuscript; available in PMC: 2010 Jun 1.
Published in final edited form as: Vision Res. 2009 Apr 7;49(11):1389–1396. doi: 10.1016/j.visres.2008.10.012

Figure 6.

Figure 6

Mean threshold contrast energy (Et) as a function of noise spectral density (N) for representative mean data from Fig. 5 for either dynamic (A) or static (B) noise, using target durations of both 20 and 280 ms (A) or only 280 ms (B), and for either the synchronous mode or an asynchronous mode in which the noise duration preceding and following the test target was 100 ms. Error bars indicate±1 SEM. Lines represent Eq. 3 and were used to derive the estimates of Neq and sampling efficiency presented in Table 1.