Given these considerations, the latest version of the WISC battery (WISC-IV) includes the recommendation that we pay
less attention to the FSIQ and more to the four factor indexes representing intelligence in verbal comprehension (VCI),
perceptual reasoning (PRI), working memory (WMI), and processing speed (PSI). Some authors maintain, however, that
switching from earlier versions to the latest version of the WISC has not changed the state of things, and that the FSIQ
remains the most informative measure of intelligence – as confirmed, for instance, by a better long-term stability (Watkins,
Glutting, & Lei, 2007; Watkins & Smith, 2013).