Review of the K-ABC: Reflecting the Unobservable

In response to Dr. Randy Kamphaus' paper on the theoretical origins of the Kaufman Assessment Battery for Children (Kaufman & Kaufman, 1983), an argument is made that relates to the lack of factor analytic support for the independence of simultaneous and sequential mental processing, the tenuous claim that the K-ABC's mental processing and achievement scales are measuring different constructs, and that meaningful measures of intelligence can be considered as content free.