Resolution:
standard / ## Figure 3.
Comparison of the sampling properties of different information quantities and of bias
correction techniques. The estimates of information and entropies obtained with a number of techniques
are tested on simulated data and plotted as a function of the number of generated
trials per stimulus. Results were averaged over a number of repetitions of the simulation
(mean value ± st. dev. over 50 simulations). We generated simulated LFPs which matched
the second order statistics of LFPs recorded from primary visual cortex during visual
stimulation with color movies (see Appendix A). The neural response used to compute information was a two dimensional response array r = [r r_{1}, r_{2}] containing the simulated LFP power at frequencies f_{1 }= 4 Hz and f_{2 }= 75 Hz, respectively. The power at each frequency was binned into 6 equi-populated
values. A: Values of the four plug-in entropies H(), RH(|RS), H_{ind}(|RS) and H_{sh}(|RS). B: Values of the bootstrap estimates of the quantities in Panel (A), computed by randomly
pairing trials and stimuli. C: Mutual information values obtained with plug-in estimate (black line) and following
the application of two bias correction procedures, namely QE (red line) and PT (green
line). D: values of the same quantities reported in panel (C), but after further subtracting
the bootstrap correction. E: Values of the information I_{sh}(S; ) computed using the shuffling procedure with the following bias corrections: plug-in
(black line); QE (red line) and PT (green line). RF: values of the same quantities reported in panel (E), but after further subtracting
the bootstrap correction.
Magri |