To give a "for instance" on what aeh is saying - - - -
It's helpful to note that the WISC-IV Comprehension test is not what most of us would think it is. The sub-title is actually "Practical Social Reasoning". Once we figured that out, it made sense for this sub-test be a major low outlier in my DS's verbal index. His Comprehension score did in fact increase quite a bit as he gained life experience between the two times he was tested (ages 8 and 10), but still remained lower than his other verbal scores by a couple of standard deviations. The challenges that undoubtedly feed into the lower Comprehension scores just get more apparent as he grows older (12 now) - extreme inattentive ADHD, anxiety, weak social skills, and probably expressive language deficits.
