The two-parameter families of pdfs (top) and their ‘evidence contributions’ <i>L</i>_<i>i</i>(<i>j</i>) (bottom).

<p>Panels a-d show the lognormal, gamma, inverse Gaussian, and inverse gamma pdfs respectively, for the independent variance parameter set Ω_<i>IV</i> (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0124787#sec019" target="_blank">Methods</a>). The ‘preferred’ and ‘null’ density functions (<i>f</i>_*, <i>f</i>₀) are in red and black respectively. The plots are for ISIs from 1 to 100 ms. For infinitesimal ISIs, the lognormal, inverse Gaussian and inverse gamma tend to zero; for the the gamma the pdf grows up to a bound as the ISI tends to zero. Panels e-f are the corresponding contributions <i>L</i>_<i>i</i>(<i>j</i>) to the accumulated ‘evidence’ <i>y</i>_<i>i</i>(<i>T</i>) (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0124787#pone.0124787.e019" target="_blank">Eq 9</a>) and the separate components therein (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0124787#pone.0124787.t001" target="_blank">Table 1</a>). <i>L</i>_<i>i</i>(<i>j</i>) itself is shown in red, the constant term </p><p></p><p></p><p><mi>g</mi><mn>0</mn><mi>D</mi></p><p></p><p></p> (<i>D</i> = <i>L</i>, <i>γ</i>, <i>S</i>, <i>M</i>) by the solid black line, and non-constant terms by dashed-grey and broken-black lines. The horizontal dashed grey line indicates 0 on the <i>y</i>-axis.<p>