ࡱ> 130 Xbjbj>> .$pTpTX$$$$$8888T80hhhhhCCC#%%%%%%$*I$CCCCCI$$hh^C $h$h#C#h~M t0W@$xCCCCCCCIICCCCCCCCCCCCCCCC : March 19, 2016 Charles Golden, Ph.D. Alan Raphael, Ph.D. Co-Editors, Archives of Assessment Psychology Subject: SUBMISSION OF MANUSCRIPT FOR REVIEW Enclosed you will find a manuscript entitled Invalidating the Full Scale IQ Score in the Presence of Significant Factor Score Variability: Clinical Acumen or Clinical Illusion? submitted to Archives of Assessment Psychology for evaluation. The manuscript includes 6 tables and 3 figures and has been formatted to comport with the submission guidelines outlined on the journal webpage. Within the assessment literature, it is routinely suggested that significant variability among factor and index scores renders the global IQ score an invalid measure of overall ability (e.g., Flanagan, Ortiz, & Alfonso, 2013; Lezak, Howieson, Bigler, & Tranel, 2012). In those cases, psychologists are encouraged to disregard the FSIQ and focus their interpretive weight on the profile of lower-order scores when engaging in diagnostic decision-making (e.g., Courville, Coalson, Kaufman, & Raiford, 2016). Although the techniques to account for the effects of scatter on the FSIQ vary across measures, they all assume that meaningful levels of scatter fracture the global composite, rendering it inconsequential for interpretive foci (Reschly, Myers, & Hartel, 2002). Despite its popularity, previous investigations have largely found that the FSIQ remains a robust and valid predictor of achievement in the presence of significant scatter or variability. However, investigations as to the potential impact of scatter on the latent structure of measurement instruments have been scarce. As a result, methodologists (e.g., Dana & Dawes, 2007; Daniel, 2007) have encouraged researchers to utilize factor analysis to further explore this area of research. To date, only Daniel (2007) has explored whether a higher-order factor could be explicated from scattered WISC index scores in an EFA simulation study. Although he found that a higher-order factor remaining plausible, hierarchical structure was not explicated, suggesting that our understanding of the effect of scatter on higher- and lower-order constructs is presently unknown. As insisted by Carroll (1993; 1995), the present study utilized exploratory and hierarchical procedures to examine the latent structure of the KABC-II with normative participants who presented with significant levels of scatter using Kaufman et al.s (2005) criteria for invalidating the global composite on the measurement instrument. It is believed that the results of the current study will have broad applicability across a number of clinical domains (e.g., school and clinical psychology) and will potentially generate a healthy discussion regarding the use of this interpretive heuristic in clinical practice. Given the popularity of IQ tests, it is believed that these findings will appeal to a wide variety of assessment psychologists and assessment researchers. As a consequence, I believe the current manuscript is well suited for this venue and hope that you will agree. I also think that the open journal format is good fit for this manuscript as it potentially allows for more in-depth analysis and discussion than is often possible in other journals (e.g., Psychological Assessment). Additionally, my research and practice interests align strongly with the mission of the ABAP and it is my goals to one day pursue the diplomate and thus I am hopeful that this will be the beginning of a long-term relationship with your organization and the journal. As you are no doubt aware, in my field (school psychology), many of our Tier 1 journals are becoming less receptive to psychometric research and thus, I believe strongly in supporting journals that allow for and support these submissions. This manuscript has not been published elsewhere nor is it currently being considered by another publication. I wish to declare no conflicts of interest as it relates to the research and preparation of this manuscript. I thank you for your time and consideration of this manuscript, if you have additional questions or concerns please do not hesitate to contact me. Author contact information: Ryan J. McGill, Department of Psychology and Philosophy, Texas Womans University, P.O. Box 425470, Denton, TX 76204. E-Mail: rmcgill@twu.edu Sincerely, Ryan J. 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