On the relationship between the JCCES and the Reynolds Intellectual Assessment Verbal Scale (Part 3)

Mean and SD for the JCCES and RIAS scores are given in the table below.

As can be seen in Figures 1, 2, 3 and 4, the examination of observed correspondences between JCCES and RIAS scores indicate a high degree of similarity in ability levels up to approximately 1.5 SD above the general population average. The JCCES and the verbal RIAS were not longer comparable above this level.