The summary statistics for the Internalizing Scale scores reveal that 75% of the sample scored a 2 or lower despite the instrument’s theoretical range of 0 to 21. However, Figure 1 shows that, even though the distribution is skewed to the right, the right tail of the distribution is not driven by outliers, but rather by the upper quartile of the sample where total scale scores steadily decrease. We believe that the range of this scale will accommodate populations with more internalizing characteristics; predominantly female individuals or patients ascertained for anxiety or mood disorders, for example, might be reasonably expected to exhibit higher mean and median statistics and to more fully exploit the range of this instrument.
