*2.6. Data Synthesis*

We used a narrative approach to data synthesis, which is the preferred method when empirical approaches and variables are highly varied across studies [17]. Tools were then categorized by the domain or construct area they assessed. This classification was initially made by a developmental-behavioral pediatrician (SMH) and then independently by 3 volunteer neuropsychologists. We used outcome, tool domain, and a study quality assessment as the classification schemes for synthesizing data.
