op'>(</span><span class='fl'>4</span>, <span class='fl'>6</span><span class='op'>)</span>,
itemtype.effect <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='fl'>0</span>, <span class='fl'>0.3</span><span class='op'>)</span><span class='op'>)</span>

<span class='co'># A latent regression model (LRM) with person group effects with 10 items and 1000 persons</span>
<span class='co'># The first half of the persons will be group =