I just posted a brief introduction and overview SlideShare regarding the new WJ IV battery (that was released this month). The slideshow does contain some of the same slides that were in three prior slideshows posted from the WJ IV NASP 2014 workshop by myself, and Dr.'s Schrank and Mather. This module serves as a general purpose introduction and overview. Additional slideshows will be posted in the future that deal with specific topics, features, data, etc. in greater depth.
[Conflict of interest disclosure: I am a coauthor of the WJ III and WJ IV.]