ed value of the
    parameters.  Note that for GLMMs, the returned value is only
    proportional to the log probability density (or distribution) of the
    response variable.  See <code><a href="https://rdrr.io/r/stats/logLik.html" class="external-link">logLik</a></code>.</p></dd>

  <dt><code>model.frame</code>:</dt>
<dd><p>returns the <code>frame</code> slot of <code>merMod</code>.</p></dd>

  <dt><code>model.matrix</code>:</dt>
<dd><p>returns the fixed effects model matrix.</p></dd>

  <dt><code>nobs</