Fig. 2

Cumulative distribution function (CDF) of the stimulus strength, \(I_{ext}\), obtained with Eq. (12) (a), (c) and Eq. (13) (b) combined with Eq. (14) for 10 equally spaced \(\alpha\) values increasing from left to right and \(\alpha + \beta\) fixed ((a), (b): \(1.2\le \alpha \le 3\) and \(\alpha +\beta =4\); (c): \(1.4\le \alpha \le 5\) and \(\alpha +\beta =6\)). Varying \(\alpha\) and \(\beta\) for increasing values of \(\alpha +\beta \ge 3\) yields broader ranges of the \(I_{ext}\) median and standard deviation (with smaller values for the latter: \(\sim 0.19-0.22\) in (a) and \(\sim 0.14-0.19\) in (b)). Values such that \(\alpha +\beta = 4,5\) present a good balance of medians that cover relatively well the [0,1] interval with relatively invariant and not too small variances.