ized-multilevel-functions">Defining customatized multilevel functions<a class="anchor" aria-label="anchor" href="#defining-customatized-multilevel-functions"></a>
</h2>
<p>Sometimes, we may not want to add one random effect structure to all
models and instead explore more specific random structure (and even
several different random effect structures). In this case, we create
several customized lmer-functions that account for different nesting
structures.</p>
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