The planned interaction contrast indicated a significant difference (ps < .006) between the differences of (AE+ and AE−) and (ADHD and CON) for both VCI and PRI. Simple effects indicated that the interaction contrast was driven by the difference of ADHD and CON (ps <.001; ADHD < CON); there were no differences between the AE+ and AE− group on either VCI or PRI (ps > .216), which supports the use of the combined AE+/− group in subsequent analyses. Importantly, the proportion of children with ADHD (70%) in this combined group was consistent with previous studies of children with FASD (Fryer, et al., 2007; Landgren, et al., 2010). This combined AE+/− group performed significantly worse than the ADHD group on both VCI (p < .001) and PRI (p = .009). Additionally, the combined AE+/− performed significantly worse than the control group on both measures (ps < .001). See Table 5.
