gmann, H., &amp; Kellen, D. (2019). <a href="http://singmann.org/download/publications/singmann_kellen-introduction-mixed-models.pdf, preprint">An introduction to linear mixed modeling in experimental psychology</a>. In <em>New methods in cognitive psychology</em> (pp. 4–31). Psychology Press.
</div>
<div class="csl-entry">
Soto, C. J., &amp; John, O. P. (2017). The next big five inventory (BFI-2): Developing and assessing a hierarchical model with 15 facets to enhance bandwidth, fidelity, and predictive 