Age-centered and weighted correlations between theta ERO measures both within (intramodal) and between (intermodal) visual and auditory modalities for all pairs of locations were calculated using an approach similar to that employed in the regression analysis, using the same age intervals and same weights as used in the regression analysis. This calculation produces a sequence of 131 correlations for each pair of measures, resulting in 6 intramodal sequences and 9 intermodal sequences per gender. One statistical test was planned on the individual sequences of correlations: whether there was an increase in correlation from age 12 to age 25 for each correlation sequence, using a bootstrap-normal method with the same 1000 resamplings as used for the developmental model.
