t the column-wise mean) across observations. CCI was
derived from the variation in resulting predictions, and scaled to have
mean 0 and variance 1.</p>
<p><span class="math display">$$
CCI_{i} = \\(pi - mean(p)\\) / sd(p)
$$</span></p>
<p>Version 2022 changed the functional form of the predictive model from
a (mostly) linear mixed-effects model to a random forest. Further, it
removed <code>observer_id</code> and <code>checklist_number</code> from
the suite of predictive features; the model is now blind to
p