Standard Analytic Procedures

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<h2>Default lab data analysis choices</h2> <p>Here's a page where we write down lab default data analysis choices. The goal is that this guides our practice and constitutes a "default registration."</p> <h3>Data analysis</h3> <ul> <li>Reaction times are clipped at +/- 3 SDs, computed in log space</li> <li>RTs are modeled in log space, not linear.</li> <li>Mixed effects models always start with maximal random effects structure (e.g., from Barr et al.).</li> <li>In cases of non-convergence, we prune interaction random slopes, first from items, then from subjects. Then we remove item random effects altogether. </li> <li>We use the t = z approximation for computing p-values in mixed effects models. </li> </ul> <h3>Children</h3> <ul> <li>We exclude children for bilingualism at &lt; 75% reported English exposure on our form. </li> <li>We also exclude children for parent/sibling interference, and for self-reported developmental disability (e.g., ID, SLI, ASD, ADHD). </li> <li>We <em>don't</em> exclude premature infants in preschooler studies (e.g., age 2 and above).</li> <li>When not otherwise specified, we use the 50/50 rule for excluding trials and children from eye-tracking studies: exclude the trial if &gt; 50% of data is missing, exclude the child if &gt; 50% of trials are missing. </li> </ul>
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