"Intelligent" intelligence testing with the WJ IV COG #7: Why do some individuals obtain markedly different scores on the various WJ IV Ga tests?

This is # 7 in the "Intelligent" intelligence testing with the WJ IV COG series at IQs Corner.  Copies of the PPT module can be downloaded by clicking on the LinkedIn icon in the right-hand corner of the slide show below  A PDF copy of all slides can be found here.

This module was developed in response to a thread on the IAPCHC listserv where an individual asked for help in understanding why the WJ IV Phonological Processing test score could be so much different (lower) that the WJ IV Sound Blending and Segmentation test scores.

Enjoy.

"Intelligent" intelligence testing with the WJ IV COG: Why do some individuals obtain markedly different scores on the various WJ IV Ga tests? from Kevin McGrew

The CHC model of human cognitive abilities--a proposed revision (v2.3): Has Glr been incorrectly conceptualized since 1997?

This presentation contains a historical overview of the derivation of the Glr ability domain in contemporary CHC theory. It then presents new data, as well as historical conclusions of the CHC masters, that makes a strong case for replacing the stratum II broad ability domain of Glr with two separate broad ability domains of Gl (learning efficiency) and Gr (retrieval fluency). How to obtain WJ IV scores for these two broad abilities is presented, as well as other possible Gl and Gr tests indicators from the CHC cross-battery literature.

A pdf copy of this set of slides, one per page, can be downloaded here.

CHC model of inteligence revised (v2.4). Has Glr been incorrectly conceptualized since 1997? from Kevin McGrew

How to evaluate the unusualness (base rate) of WJ IV cluster or test score differences: It is a pleasure to use the correct measure - A SlideShare presentation

The WJ IV provides two primary methods for comparing tests or cluster scores.  One is based on a predictive model (the variation and comparison procedures) and the other allows comparisons of SEM confidence bands, which takes into account each measures reliability.  A third method for comparing scores, one that takes into account the correlation between compared measures (ability cohesion model) is not provided, but is frequently used by assessment professionals.  The three types of score comparison methods are described and new information, via a "rule of thumb" summary slide and nomograph, are provided to allow WJ IV users to evaluate scores via all three methods.

A PDF copy of the key WJ IV base rate rule-of-thumb slide can be found here.

How to evaulate the unusualness (base rate) of WJ IV cluster or test score differences: It is a pleasure to use the correct measure from Kevin McGrew

Human Intelligence Research: Connecting the Dots Video

The WJ IV Measurement of Auditory Processing (Ga): An online powerpoint slide show

The WJ IV Measurement of Auditory Processing (Ga) from Kevin McGrew

The WJ IV Cognitive and Oral Language include new measures of auditory processing (Ga) that are much more cognitively complex auditory measures of intelligence.  This short presentation provides an overview of the WJ IV Ga tests and presents evidence supporting the importance of Ga as a major component of human intelligence.

WJ IV update: WJ IV g-scores (GIA,BIA,Gf-Gc composite) correlations with WISC-IV/WAIS-IV FS and GAI IQ scores

In the WJ IV technical manual (McGrew, LaForte, Schrank, 2014) concurrent validity results are presented for the WJ IV COG with the WISC-IV and WAIS-IV (click here for WJ IV COG overview and select correlation information from tech. manual).

A number of psychologists have asked about correlations between the primary WJ IV COG g-scores and the Wechsler General Ability Index (GAI).  They are not presented in the technical manual.  I have now computed those correlations, as well as a few others with the Wechsler GAI, and they are now part of the SlideShare at the link above and are also reported below.  Click on image to enlarge.

WJ IV Cognitive Battery: Overview of GIA and CHC clusters - a WJ IV slideshow

Overview of the WJ IV Cognitive Battery: GIA and CHC Clusters from Kevin McGrew

The WJ IV Battery: Select Technical and Psychometric Information Overview. A Slide show

WJ IV Battery: Select Technical and Psychometric Information Overview from Kevin McGrew

 

The WJ IV: Introduction and Overview slideshow

I just learned that I can embed my SlideShare shows directly into blog posts...hot dog. Here is the last one I had uploaded to SlideShare. I will be adding others, and they will all have the key label "slide shows" so all can eventually be accessed by clicking on the "slide show" in the labels section of the blog roll on the right side of my blogs

WJ IV Battery Introduction and Overview from Kevin McGrew

WJ IV Battery Revision: Brief Introduction and Overview SlideShare Show Posted

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.]