Summary Evaluation The major strength of the WJIII is that the batteries have norms that are based on data from the same sample. This allows the individual's test scores from the WJIII COG standard and extended, WJIII ACH standard and extended and DS to be directly compared which is not possible with separately normed tests. Being co-normed also has the advantage of the batteries functioning together and the user being able to administer selected tests or clusters as required for the individuals testing requirements. Co-norming also allows for the ability to compute discrepancy scores that can be used in diagnostic testing (Cizek, 2003; R. W. Woodcock et al., 2001). Another major strength of the WJIII is that the standardized sample it was normed on was large, consisted of a broad age range and across a range of geographical and economically diverse communities in the U.S. (Sandoval, 2003) this give it the ability to accurately test not just the cultural majority but minority individuals too.…show more content… The Standards for Educational and Psychological Testing have informed the development of the WJIII and are referenced through out the manuals; they are also used as guidelines in the gathering or reliability and validity data (Cizek, 2003). The administration procedures are simple and adaptable to individual with specific needs. While scoring, interpreting and reporting are made easier through the use of computer software specifically designed for the WJIII (Schrank et al.,
