MedWorm provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest medical blog items that have been tagged with 'horn'. Sat, 03 Sep 2011 02:32:30 +0100 http://www.medworm.com/index.php?rid=5028710&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2011%2F07%2Fwmf-human-cognitive-abilities-archive.html The free on-line WMF Human Cognitive Abilities (HCA) archive project had a MAJOR update today. An overview of the project, with a direct link to the archive, can be found at the Woodcock-Muñoz Foundation web page (click on "Current Woodcock-Muñoz Foundation Human Cognitive Abilities Archive") . Also, an on-line PPT copy of a poster presentation I made at the 2008 (Dec) ISIR conference re: this project can be found by clicking here.Today's update added the following 29 new data sets from John "Jack" Carroll's original collection.  We now have approximately 40% of Jack Carroll's original datasets archived on-line.PIMS01/PIMS02  Pimsleur, P., Stockwell, R. P., 7 Comrey, A. L. (1962). Foreign language learning ability. Journal of Educational Psychology, 53, 15-26. PEDU01 &nbs... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=5028710 Wed, 13 Jul 2011 13:36:00 +0100 5028710 http://www.medworm.com/index.php?rid=4338111&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2011%2F01%2Fhuman-processing-speed-hierarchical.html There is an active thread on the NASP (National Association of School Psychologists) listerv this morning re: what is the nature of "processing speed" (Gs as per CHC theory).  Coincidentally, the past few days I have been writing on the psychometric research re: the domain of human cognitive speed.  Dr. Joel Schneider and I are working on a CHC theory chapter manuscript, and this is proposed to be in the chapter.Related to the text is the following proposed hierarchical model of cognitive speed...which suggests that psychologists need to understand that it may be a much more complex domain with it's own hierarchy and g-type (g-speed) factor at the apex.  The figure below was first included in McGrew and Evan's (2004), where the hierarchy was first proposed.  Joel Schnei... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4338111 Wed, 12 Jan 2011 19:08:00 +0100 4338111 http://www.medworm.com/index.php?rid=4304989&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2011%2F01%2Fmds-analysis-of-wisc-iv.html It is no secret that I'm a big fan of multidimensional scaling (MDS--especially Guttman's Radex) model as a supplement to factor analysis of cognitive tests. While going thru some of my e-files I found a recent 3D MDS analysis of the WISC-IV. Below is the abstract and final 3D model. Clicking on images should take you to a larger version of the image.For those interested, the content/stimulus dimension of my proposed cognitive ability assessment design and interpretation matrix is due to my application of MDS to data from the WJ III and the various Wechsler batteries. The complete "beyond CHC theory" presentation can be found at a prior post.- iPost using BlogPress from my Kevin McGrew's iPadintelligence IQ tests IQ scores CHC theory Cattell-Horn-Carroll human cognitive abilities psycholog... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4304989 Sun, 02 Jan 2011 19:43:00 +0100 4304989 http://www.medworm.com/index.php?rid=4300623&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F12%2Fvisual-gv-summary-of-chc-intelligence.html I was skimming the article below and found a nice figure that summarizes the CHC abilities measured by the WJ III Tests of Cognitive Abilities. I love good visual (Gv) summaries. If things work correctly, if you click on the images they should enlarge.Conflict of interest notice - I am a coauthor of the WJ III.- iPost using BlogPress from my Kevin McGrew's iPadintelligence IQ tests IQ scores CHC theory Cattell-Horn-Carroll human cognitive abilities psychology school psychology individual differences cognitive psychology neuropsychology special education educational psychology psychometrics psychological assessment psychological measurement IQs Corner neuroscience neurocognitive cognitive abilities cognition WJ III Woodcock-Johnson CHC theory CHC intelligence theory (Source: Intelligent Ins... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4300623 Fri, 31 Dec 2010 03:20:00 +0100 4300623 http://www.medworm.com/index.php?rid=4294831&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F12%2Fgerman-gc-crystallized-iq-res-synthesis.html Copy of open access article can be found by clicking here. Double click on image to enlarge.- iPost using BlogPress from my Kevin McGrew's iPadintelligence intelligence testing Atkins cases ICDP blog psychology school psychology neuropsychology Forensic psychology criminal psychology criminal justice death penalty capital punishment ABA IQ tests IQ scores adaptive behavior AAIDD mental retardation intellectual disability Flynn effect (Source: Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner)) Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4294831 Mon, 27 Dec 2010 16:58:00 +0100 4294831 http://www.medworm.com/index.php?rid=4251187&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F12%2Fresearch-byte-more-on-knows-go-and.html I continue to be intrigued with the increasing research on the domain of Go.......I have posted a number of articles at my blog over the past five years (can be found by clicking on Go category label) that indicate that it is a separate cognitive domain and, more importantly, it has significant diagnostic potential for a wide array of cognitive disorders, esp. during the early stages of a disorder.The nose knows :)Cognitive factors in odor detection, odor discrimination, and odor identification tasks. Journal of Experimental and Clinical Neuropsycholgy, 32 (10), 1062–1067Authors: Margareta Hednerab; Maria Larssonab; Nancy Arnoldc; Gesualdo M. Zuccod; Thomas HummelcAbstractThe purpose of this study was to determine cognitive correlates of olfactory performance across three different tasks... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4251187 Sat, 11 Dec 2010 17:06:00 +0100 4251187 http://www.medworm.com/index.php?rid=4251188&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F12%2Fdissertation-dish-wisc-iv-and-wj-iii.html This study concluded that research findings for the WISC-III cannot be applied conclusively to the WISC-IV and that the substantive changes made to the WISC-IV have improved the ability to interpret the battery under the CHC framework. However, findings underscore the importance of examining performance across second-order factors that may contribute to differences in general intelligence, as well as remaining aware of differences in narrow ability constructs measured, task demands, or shared variance between subtests when making interpretations of test performance.- iPost using BlogPress from my Kevin McGrew's iPadintelligence IQ tests IQ scores CHC theory Cattell-Horn-Carroll human cognitive abilities psychology school psychology individual differences cognitive psychology neuropsycholog... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4251188 Sat, 11 Dec 2010 16:44:00 +0100 4251188 http://www.medworm.com/index.php?rid=4119379&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F10%2Fchc-theory-tipping-point-passed-inroads.html In 2005 I unilaterally claimed that the Cattell-Horn-Carroll (CHC) theory of cognitive abilities had reached the "tipping point" in school psychology--it had become the consensus psychometric framework from which new intelligence tests are developed, old ones are revised, and non-CHC batteries are analyzed. Later in 2007 I again revisited my "tipping point" claim by analyzing the use of keywords in the National Association of School Psychologists (NASP) general service listserv. At that time I concluded that the actual tipping point occurred (in school psychology) sometime between 2001 and 2003.Today I decided to see if the school psychology CHC tipping point had spilled over and gained traction in more mainstream psychology. In particular, I was interested in how often the terms "CHC" or ... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4119379 Tue, 26 Oct 2010 14:00:00 +0100 4119379 http://www.medworm.com/index.php?rid=4098206&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F10%2Ffrench-wais-iii-study-supports-primary.html Interesting study with French WAIS III that provides additional support for quantitative knowledge (Gq) being the primary source of variance in understanding the Arithmetic subtest, as well as some processing speed (Gs) in adults. Click here for prior post on this topic. Rozencwajg, P., Schaeffer, O., & Lefebvre, V. (2010). Arithmetic and aging: Impact of quantitative knowledge and processing speed. Learning and Individual Differences, 20(5), 452-458.AbstractThe main objective of this study was to examine how quantitative knowledge (Gq in the CHC model) and processing speed (Gs in the CHC model) affect scores on the WAIS-III Arithmetic Subtest (Wechsler, 2000) with aging. Two age groups were compared: 30 young adults and 25 elderly adults. For both age groups, Gq was an important predictor... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4098206 Sun, 24 Oct 2010 00:44:00 +0100 4098206 http://www.medworm.com/index.php?rid=4040666&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F10%2Fresearch-bytes-10-7-10-pda-notebook-and.html Schroeders, U., & Wilhelm, O. (2010). Testing Reasoning Ability with Handheld Computers, Notebooks, and Paper and Pencil. European Journal of Psychological Assessment, 26(4), 284-292.Electronic devices can be used to enhance or improve cognitive ability testing. We compared three reasoning-ability measures delivered on handheld computers, notebooks, and paper-and-pencil to test whether or not the same underlying abilities were measured irrespective of the test medium. Rational item-generative principles were used to generate parallel item samples for a verbal, a numerical, and a figural reasoning test, respectively. All participants, 157 high school students, completed the three measures on each test medium. Competing measurement models were tested with confirmatory factor analyses. Re... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4040666 Thu, 07 Oct 2010 15:30:00 +0100 4040666 http://www.medworm.com/index.php?rid=4036792&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F10%2Fnew-directions-in-neuropsychological.html I just returned from Australia where I made a number of presentations.  Two were at the 2010 16th Annual APS College of Clinical Neuropsychologists Conference.  I just posted the slides (at my SlideShare site - click here) from my 2+ hour workshop:  New directions in neuropsychological assessment: Augmenting neuropsychological assessment with CHC cognitive measures.Briefly, the workshop is my first attempt to integrate CHC with neuropsychological assessment, with an emphasis on how NP tests can be interpreted from the CHC intelligence model which can then serves as a foundation for follow-up testing of NP tests with CHC measures.  Below are a few "tease" slides to get readers interested.  The last slide is derived from the keynote presentation I made (Beyond CHC th... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=4036792 Wed, 06 Oct 2010 15:03:00 +0100 4036792 http://www.medworm.com/index.php?rid=3982051&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F09%2Fresearch-bytes-9-18-2010-gf-and-math.html Ferrao, M. & Almeida, L. Fluid intelligence as a predictor of learning: A longitudinal multilevel approach applied to mathsta.  Learning and Individual Differences. AbstractThe association between fluid intelligence and inter-individual differences was investigated using multilevel growth curve modeling applied to data measuring intra-individual improvement on math achievement tests. A sample of 166 students (88 boys and 78 girls), ranging in age from 11 to 14 (M = 12.3, SD = 0.64), was tested. These individuals took four math achievement tests, which were vertically equated via Item Response Theory, at the beginning and end of the seventh and eighth grade. The cognitive abilities studied were Numerical Reasoning, Abstract Reasoning, Verbal Reasoning, and Spatial Reasoning (as measure... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3982051 Sat, 18 Sep 2010 19:43:00 +0100 3982051 http://www.medworm.com/index.php?rid=3895993&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F08%2Fflynn-effect-and-iq-disparities-among.html The following is a guest blog post by Scott Barry Kaufman, the author of the most excellent Psychology Today Beautiful Minds blog---a regular read of this blogmaster.  A number of the links in the article were added by IQs Corner blogmaster.The Flynn Effect and IQ Disparities Among Races, Ethnicities, and Nations: Are There Common Links?By Scott Barry Kaufman, Ph.D.Over the years, various ‘social multipliers' (Dickens & Flynn, 2006) have been proposed to account for the Flynn Effect-the dramatic increase in IQ witnessed every decade of the 20th century. Potential environmental effects include increased nutrition, increased test familiarity, heterosis, increased scientific education, video games, TV show complexity, modernization, and more. Surely a combination of factors contrib... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3895993 Mon, 23 Aug 2010 18:06:00 +0100 3895993 http://www.medworm.com/index.php?rid=3876784&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F08%2Freading-fluency-and-reading-lddyslexia.html The following is a guest blog post (previously called virtual scholars at this blog)  by John J. DeMann, NCSP, School Psychologist, North Allegheny School District.  John took advantage of my standing offer to readers of my blogs to receive a PDF copy of any article I mention in a research brief (or byte ) or any article that may be in a recent "IQs Corner Recent Literature of Interest" post.  I know that many practitioners do not have access to journals......so if a person volunteers to make a brief written post, I'm willing to send them a PDF copy of the article in exchange for the post.This feature benefits all readers as the post is "added value and commentary" which then allows me to provide a link to the full article (via the "fair use doctrine"---esp. for educational ... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3876784 Tue, 17 Aug 2010 15:45:00 +0100 3876784 http://www.medworm.com/index.php?rid=3823025&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F08%2Fnew-flynn-effect-related-article-in.html This article will be added to the Atkins MR/ID Flynn Effect Archive when it is next updated.  Stay tuned.What I particularly like about the article is the fact that the author conceptualizes, organizes, and interprets the research findings in the context of contemporary Cattell-Horn-Carroll (CHC) theory of intelligence....the theory I continue to advocate for as the best current psychometric taxonomy for understanding intelligence test performance.Anyone who would like to get early access to a PDF copy of the article in EXCHANGE for a guest blog post at this blog, should contact the blogmaster at iap@earthlink.netMarks, D. F. (2010). IQ VARIATIONS ACROSS TIME, RACE, AND NATIONALITY: AN ARTIFACT OF DIFFERENCES IN LITERACY SKILLS. Psychological Reports, 106(3), 643-664.A body of data on... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3823025 Wed, 04 Aug 2010 20:45:00 +0100 3823025 http://www.medworm.com/index.php?rid=3490746&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F04%2Fwmf-human-cognitive-abilities-project.html The free on-line WMF Human Cognitive Abilities (HCA) archive project was updated today. An overview of the project, with a direct link to the archive, can be found at the Woodcock-Muñoz Foundation web page (click on "Current Woodcock-Muñoz Foundation Human Cognitive Abilities Archive") . Also, an on-line PPT copy of a poster presentation I made at the 2008 (Dec) ISIR conference re: this project can be found by clicking here.Today's update added the following 22 new data sets from John "Jack" Carroll's original collection.**GUIL31, GUIL32A, GUIL41:     Guilford, J.P., Lacey, J.I. (Eds.) (1947).  Printed classification tests.  Army Air Force Aviation Psychology Program Research Reports, No. 5.  Washington, DC: U.S. Government Printing Office. [discussed ... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3490746 Tue, 20 Apr 2010 20:01:00 +0100 3490746 http://www.medworm.com/index.php?rid=3346586&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F03%2Fiq-test-dna-fingerprints-comparison-of.html Here is another in the series of IQ's Corner "IQ Test CHC DNA Fingerprint" test comparison series.  This particular CHC fingerprint figure compares the CHC composition of the respective full scale total composite IQ scores from the WJ III/BAT III and the WISC-IV and WAIS-IV.Background information regarding the development, use and interpretation of this feature can be found at a prior post and in the IQ Test CHC DNA Fingerprint section on the blog side bar.More to come. [Double click on image to enlarge]Technorati Tags: psychology, school psychology, educational psychology, clinical psychology, neuropsychology, forensic psychology, forensic psychiatry, intelligence, IQ tests, IQ scores, IQ, IQ testing, WISC-IV, WAIS-IV, WJ III, WJ III NU, BAT III, BAT III NU, applied psychometrics, ps... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3346586 Mon, 08 Mar 2010 19:42:00 +0100 3346586 http://www.medworm.com/index.php?rid=3302449&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F02%2Fbeyond-chc-pushing-edge-of-chc-and-wj.html This is a revision of a prior post (which I have now deleted).  I previously posted an online presentation (at SlideShare) summarizing a series of recent analysis I completed. The analysis are grounded in a variety of exploratory data analysis I  conducted over the past nine years, which when combined with recent theoretical literature, resulted in my attempt to search for possible modifications and extensions to CHC model of intelligence, as operationally defined by the WJ III test battery.The original SlideShare  file (and associated PDF copies) did not include the alternative WJ III measurement model that was the basis of the alternative CHC theoretical models presented. The current version now includes the alternative WJ III measurement model.The show can be viewed by cl... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3302449 Wed, 24 Feb 2010 14:33:00 +0100 3302449 http://www.medworm.com/index.php?rid=3251295&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F02%2Fap101-brief-6b-supplement-summaries-of.html I should have included the following tables in my original AP101 Brief # 6 report re: my analysis of the CHC content of the FS IQ scores for the various editions of the WISC--WIS-IV/WAIS--WAIS-IV intelligence batteries.  Here they are: [double click on images to enlarge]Technorati Tags: psychology, school psychology, educational psychology, forensic psychology, neuropsychology, clinical psychology, intelligence testing, intelligence, IQ, Wechsler batteries, WISC-R, WISC, WISC-III, WISC-IV, WAIS, WAIS-R, WAIS-III, WAIS-IV, IQ score differences, CHC theory, Cattell-Horn-Carroll, Flynn effect (Source: Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner)) Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3251295 Sun, 07 Feb 2010 17:14:00 +0100 3251295 http://www.medworm.com/index.php?rid=3172067&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2010%2F01%2Fpushing-edge-of-chc-theory-and-wj-iii.html I just posted a new online presentation at SlideShare summarizing a series of recent analyses I've completed. The analyses are grounded in a variety of exploratory data analysis I've completed over the past nine years, which when combined with recent theoretical literature, resulted in an attempt to search for possible modifications and extensions to CHC model of intelligence, as operationally defined by the WJ III test battery.The show can be viewed by clicking here. Alternatively, clicking here provides access to a PDF copy of the slides.This is part Iof a two-part series. Part II will present information regarding new insights into the abilities measured by some of the WJ II  individual tests as well as possible new interpretive clusters to consider.Stay tuned for updatesThe results, i... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3172067 Thu, 14 Jan 2010 15:43:00 +0100 3172067 http://www.medworm.com/index.php?rid=3133703&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2009%2F12%2Fwmf-human-cognitive-abilities-hca.html The free on-line WMF Human Cognitive Abilities (HCA) archive project was updated today. An overview of the project, with a direct link to the archive, can be found at the Woodcock-Muñoz Foundation web page (click on "Current Woodcock-Muñoz Foundation Human Cognitive Abilities Archive") . Also, an on-line PPT copy of a poster presentation I made at the 2008 (Dec) ISIR conference re: this project can be found by clicking here.After a period of inactivity (due to being swamped), I am pleased to announce the following additions and revisions.Currently, 115 of Jack Carroll's original correlation matrices (in Excel file format) are now available at the archive. These correlation files can be downloaded for free and can be used for secondary data analysis. Of these 115, 75 also include the ori... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3133703 Wed, 30 Dec 2009 20:57:00 +0100 3133703 http://www.medworm.com/index.php?rid=3124625&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2009%2F12%2Fdssertation-dish-woodcock-johnson-and.html Validation of neuropsychological subtypes of learning disabilities by Hiller, Todd R., Ph.D., Ball State University, 2009 , 99 pages; AAT 3379243Abstract The present study used archival data of individuals given the Woodcock-Johnson Tests of Cognitive Abilities 3 rd Edition and the Woodcock-Johnson Tests of Achievement 3 rd Edition in an effort to define subtypes of LD. The sample included 526 subjects aged 6 years to 18 years old who had a diagnosis of some type of LD. Of these, 22.7% had an additional diagnosis other than LD. It was expected that subtypes similar to Rourke's classification of his nonverbal learning disorder and his basic phonological processing disorder would be found.Portions of the battery were used in a latent class cluster analysis in order to determine group pattern... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3124625 Mon, 28 Dec 2009 14:45:00 +0100 3124625 http://www.medworm.com/index.php?rid=3118977&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2009%2F12%2Fchc-theory-of-intelligence-and-its.html I frequently reference the CHC (Cattell-Horn-Carroll) theory of intelligence and the impact it has had on contemporary intelligence test development.  I realize that not everyone has the time to rummage through all the blog posts I've made regarding CHC theory.  Thus, today I'm posting a brief summary of CHC theory and its impact on applied intelligence test development.  The summary includes hyperlinks to key references, terms, and other readings (for more indepth information).  The report can be viewed as a web page or can be downloaded or viewed as a PDF file.EnjoyTechnorati Tags: psychology, educational psychology, school psychology, neuropsychology, forensic psychology, ISIR, cognition, intelligence, CHC theory, Cattell-Horn-Carroll theory, IQ, IQ tests, DAS-II, KABC-II, SB5, WJ I... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3118977 Wed, 23 Dec 2009 16:42:00 +0100 3118977 http://www.medworm.com/index.php?rid=3092819&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2009%2F12%2Fsmall-v-large-scale-gv-abilities.html Yet another study suggesting that we who tend to worship at the later of the CHC taxonomy (McGrew, 2005; McGrew, 2009) need to head the warnings of  the primarily architects of the model (Horn, Carroll) who warned us (in their writings) that the taxonomy is incomplete and will evolve over time.  Evidence for the correctness of this admonition is yet another study investigating small scale Gv (e.g., SR, Vz) and large-scale Gv (e.g., environmental navigation).  Large-scale Gv is missing from the current consensus CHC taxonomy.  The study below, which found that training on small-scale Gv did not generalize to changes in large-scale Gv in children (while prior research has suggested that the two are linked in adults), is the third study I've posted that has made this small v large-scale G... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3092819 Tue, 15 Dec 2009 20:59:00 +0100 3092819 http://www.medworm.com/index.php?rid=3044882&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2009%2F11%2Fcattell-horn-carroll-chc-theory-key.html I'm often asked for copies of the key Cattell-Horn-Carroll (CHC) theory of cognitive abilities articles or book chapters I have written.  Today I finally bite the bullet and scanned my 1997 and 2005 chapters into PDF files.  Together with my 2009 editorial in Intelligence, the following are the three most current manuscripts I've authored that  provide an overview and history of CHC theory and its role in intellectual assessment.  A special sidebar section will be added to the blog so readers can locate this source page quickly when needed.McGrew, K. (2009).  Editorial:  CHC theory and the human cognitive abilities project: Standing on the shoulders of the giants of psychometric intelligence research, Intelligence, 37, 1-10. (click here)McGrew, K. S. (2005).&n... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=3044882 Mon, 30 Nov 2009 18:49:00 +0100 3044882 http://www.medworm.com/index.php?rid=2899077&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2009%2F10%2Fregular-readers-of-this-blog-know-that.html Regular readers of this blog know that I  frequently reference the need for the Cattell-Horn-Carroll (CHC) theory of cognitive abilities to be used as the organizational framework for intelligence testing.  I typically provide links to two sources (one a pre-pub version of a book chapter that was eventually published; the other an invited 2009 editorial in the journal Intelligence).  If readers take time to read these sources, they will learn that CHC theory is the combination of Cattell-Horn Gf-Gc theory and Carroll's three-stratum Gf-Gc theory [Carroll, J. B. (1993). Human cognitive abilities:  A survey of factor analytic studies. New York: Cambridge University Press].  I cannot stress enough the importance of the development of CHC theory for evidence-based inte... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2899077 Thu, 15 Oct 2009 19:23:00 +0100 2899077 http://www.medworm.com/index.php?rid=2796616&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fwww.iqscorner.com%2F2009%2F09%2Fchc-cognitive-achievement-relations.html [Double click on image to enlarge]I'm pleased to announce the completion of the Cattell - Horn - Carroll (CHC) Cognitive Abilities-Achievement Research Synthesis project, a project first described in a prior post. The purpose of this project is to systematically synthesize the key Cattell-Horn- Carroll (CHC) theory of cognitive abilities designed research studies that have investigated the relations between broad and narrow CHC abilities and school achievement.The project can be accessed via a clickable MindMap visual-graphic navigational tool (similar to the image above...but "active" and "dyanamic") or via the more traditional web page outline navigational method. You can toggle back and forth between the different navigation methods via the options in the upper right hand corner of the ... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2796616 Tue, 01 Sep 2009 18:02:00 +0100 2796616 http://www.medworm.com/index.php?rid=2611052&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F07%2Fcattell-horn-cattell-chc-intelligence.html I've been busy taking information from my Cattell-Horn-Carroll CHC (Gf-Gc) Theory:  Past, Present & Future book chapter (in Flanagan & Harrison, 2005 CIA book) and putting it together in a piece of professional timeline software (Timeline Maker).  The software is "way cool" as it allows me to embed hyperlinks to files, images, web pages, etc.  Then, I can use the software, when making presentations, and bring events in one-at-a-time.  AND, at each event there are icons that serve as menus to files, images, etc. that I can "bring up" for viewing and discussion.  I've been embedding the timeline with all kinds of historical images, original classic articles (e.g., Spearman, Thurstone, Cattell, etc.) as well as more recent CHC-related articles.  The idea is for a timeline-based ... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2611052 Thu, 16 Jul 2009 15:13:00 +0100 2611052 http://www.medworm.com/index.php?rid=2598351&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F07%2Fjohn-horn-1965-doctoral-dissertation.html John Horn's Gf-Gc dissertation available for viewing.I'm working on a visual-graphic and text-based summary and extension of my previously published "CHC Theory: Past, Present and Future" book chapter...so it can be displayed on the web, and more importantly, can serve as a presentation for instructional/historical purposes. When done I will be giving this material away to those that are interested.In the process I'm trying to embed hyperlinks to classic articles that will give readers the chance to view and read many of the seminal works that have led us to contemporary CHC theory and intellectual assessment.Today I'm posting a real gem I found in the process of completing this project. A PDF copy of John Horn's original dissertation (1965). According to Carroll (1993), this was the first... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2598351 Mon, 13 Jul 2009 15:56:00 +0100 2598351 http://www.medworm.com/index.php?rid=2469731&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F06%2Fart-and-science-of-test-development-ets.html I'm in the process of developing a four-hour course presentation on the "Art and Science of Test Development:  Theories, tools, tips and troubles" that I will unveil late July at a Brazil psychological assessment conference.  I'm very excited about putting this together.  There are many books on different aspects of test development and psychometrics, but nothing that is really "applied" test development or psychometrics.  I'm excited, but also am finding it a challenge to do within a four-hour time constraint.  When done, it may serve as the outline for a manuscript and PPT slides that may be available via the WMF.  Much of it is based on Dr. Woodock's approach to test development and he has graciously provided me access to many of his notes and documents.  If we do ever get this t... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2469731 Wed, 10 Jun 2009 21:45:00 +0100 2469731 http://www.medworm.com/index.php?rid=2458242&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F06%2Fwmf-human-cognitive-abilities-project.html The WMF Human Cognitive Abilities (HCA) project is pleased to announce the addition, to the WMF HCA Archive, the final hierarchical factor matrix solutions (produced by Jack Carroll) for each exploratory factor analysis included in his seminal 1993 Human Cognitive Abilities book.When Carroll's (1993) book was first published, individuals could purchase (from Cambridge University Press), a set of two 5.25 disks. Many researchers were very excited when they heard this news and many purchased the disks. Much of our initial excitement was dampened when the disks arrived--- as they did not include the original correlation matrix input files. However, they did contain the hierarchical factor matrix final solution Carroll produced for each dataset he had analyzed.Since Feb 2008 these disks can no... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2458242 Sat, 06 Jun 2009 19:09:00 +0100 2458242 http://www.medworm.com/index.php?rid=2447823&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F06%2Fdissertation-dish-chc-prediction-of.html Use of Cattell-Horn-Carroll specific cognitive abilities to enhance prediction of reading on the third grade Pennsylvania System of State Assessment by Nicholson, Kathleen J., D.Ed., Indiana University of Pennsylvania, 2009, 86 pages; AAT 3352434Abstract This correlational study examines three models of prediction with regard to 69 kindergarten and first grade students' later reading achievement on a third grade state assessment.The first model of prediction analyzed sex, age and maternal level of education as predictors of reading performance on the third grade Pennsylvania System of State Assessment (PSSA). The second model of prediction examined the ability of the Dynamic Indicators of Basic Early Literacy Skills (DIBELS) Phoneme Segmentation Fluency (PSF) measure to predict reading ach... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2447823 Tue, 02 Jun 2009 14:03:00 +0100 2447823 http://www.medworm.com/index.php?rid=2442114&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F05%2Fdissertation-dish-sb5-and-wisc-iv-gv_26.html Visual-spatial processing and mathematics achievement: The predictive ability of the visual-spatial measures of the Stanford-Binet intelligence scales, Fifth Edition and the Wechsler Intelligence Scale for Children-Fourth Edition by Clifford, Eldon, Ph.D., University of South Dakota, 2008, 195 pages; AAT 3351188AbstractIn the law and the literature there has been a disconnect between the definition of a learning disability and how it is operationalized. For the past 30 years, the primary method of learning disability identification has been a severe discrepancy between an individual's cognitive ability level and his/her academic achievement. The recent 2004 IDEA amendments have included language that allows for changes in identification procedures. This language suggests a specific learnin... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2442114 Tue, 26 May 2009 14:29:00 +0100 2442114 http://www.medworm.com/index.php?rid=2415549&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F05%2Fchc-theory-emergence-test-instruments_15.html Contemporary Cattell-Horn-Carroll (CHC) intelligence test development, interpretation and applied research can be traced to a fortuitous meeting of Richard Woodcock, John Horn, and John “Jack” Carroll in the fall of 1985, a meeting also attended by the first author of this web-resource ( McGrew, 2005). This meeting resulted in the 1989 publication of the first individually-administered, nationally standardized CHC-based intelligence battery, the Woodcock- Johnson- Revised (Woodcock, McGrew, & Mather, 1989). This landmark event, which occurred 20 years ago, provided the impetus for the major CHC- driven evolution of school- based intelligence testing practice. Subsequent important CHC events followed during this 20 year period, and included: (a) the first set of CHC- organized joi... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2415549 Fri, 15 May 2009 17:47:00 +0100 2415549 http://www.medworm.com/index.php?rid=2415550&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F05%2Fcattell-horn-carroll-chc-theory-of.html [Double click on image to enlarge]The Cattell-Horn-Carroll theory of cognitive abilities (CHC; Carroll, 1993; Cattell & Horn) is a hierarchical model of intelligence that combines the Cattell- Horn Gf-Gc (1987) and the Carroll tri-stratum models (1993) of human cognitive abilities (see McGrew, 2005, 2009 ). Carroll expanded on the Cattell- Horn Gf- Gc theory and proposed a three-stratum model that contains over 70 narrow or specific abilities at stratum one, eight primary second-order abilities at stratum two, and an overall g ability (general intelligence)at stratum three. The primary broad CHC abilities that relate to the content of contemporary intelligence batteries include fluid reasoning or intelligence (Gf), comprehension-knowledge or crystallized intelligence (Gc), visual- spat... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2415550 Fri, 15 May 2009 17:24:00 +0100 2415550 http://www.medworm.com/index.php?rid=2347795&cid=t_189767_87_f&fid=36438&url=http%3A%2F%2Ffeedproxy.google.com%2F%7Er%2FCato-at-liberty%2F%7E3%2FOz1smsoPW5Y%2F Even though I was on vacation last week, I followed the story of the Maersk-Alabama and Captain Richard Phillips with great interest. And I exulted when three of the four pirates met their end. The safe return of the Maersk-Alabama and her entire crew was a clear win for the cause of justice, and could serve as a model. Future efforts to protect ships from pirates are likely to include some combination of greater vigilance on the part of the shipping companies and crews, in collaboration with the navies of the many different nations who have an interest in keeping the sea lanes open and free. (This is one of the themes that I develop in my new book, and that I will discuss next Monday at Cato.) We do not need to reorient our grand strategy to deal with pirates. We don’t need to resha... Cato-at-liberty blogs http://www.medworm.com/rss/comments.php?id=2347795 Fri, 17 Apr 2009 17:36:14 +0100 2347795 http://www.medworm.com/index.php?rid=2256178&cid=t_189767_88_f&fid=38129&url=http%3A%2F%2Fsandnsurf.medbrains.net%2F2009%2F03%2Fecho-of-the-widow-dimanche%2F The registrar stood open-mouthed next to the professor. Before them was a twisted unicorn’s horn, an echo of that owned by the widow Dimanche, who sold water-cress in the streets of Paris. The patient was unmoved. Plans were made for the removal of the horn. The patient nodded and thanked the doctors. The registrar whistled as they [...] (Source: Life in the Fast Lane) Life in the Fast Lane blogs http://www.medworm.com/rss/comments.php?id=2256178 Tue, 10 Mar 2009 01:01:34 +0100 2256178 http://www.medworm.com/index.php?rid=2130082&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F01%2Fwj-iii-and-chc-nasp-boston-sessions.html Mark your NASP/Boston calendars for WJ III and/or CHC related sessions. Below is a summary of sessions. Thanks to Barb Wendling for putting this together. [Conflict of interest - I'm a coauthor of the WJ III)TUESDAY, 2/24/09 10:00-10:50 PAPER Issues in Translating Tests Into Braille: WJ III Achievement-Braille (PA044) Lynne Jaffe and Barbara Henderson 1:00-1:50 PAPER Development and Interpretation of the WJ III Relative Proficiency Index (PA062) Lynne Jaffe THURSDAY, 2/26/09 8:00-8:50 PAPER An Overview of the Human Cognitive Abilities Project (PA121) Kevin McGrew 8-9:30 POSTERS The DAS-II and WJ-III in Relation to the CHC Model (PO112) Nancy Hollander Adapting Woodcock-Johnson Tests of Cognitive Abilities for International Use (PO130) Anton Furman Predicting WJ-III Cognitive Test... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2130082 Fri, 23 Jan 2009 17:39:00 +0100 2130082 http://www.medworm.com/index.php?rid=2126478&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2009%2F01%2Fchc-cog-ach-relations-project-basic.html I just posted an on-line PPT SlideShare show that presents my current interpretation of the results of this research synthesis project in the area of basic reading skills. The show is called CHC Cog-Ach Relations: Basic Reading Skills analysis (click here to access)This presentation presents an update of the "CHC COG-ACH correlates research synthesis" project described and hosted at IQ's Corner and IAP. The viewer should first read the background materials regarding this project at these sites (how to access is also included in first slide). The current slides present my preliminary analysis and conclusions re: the relations between CHC cognitive abilities and basic reading skills as a function of age (developmental status). The results are part of a manuscript that is in preparation with ... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=2126478 Thu, 22 Jan 2009 21:57:00 +0100 2126478 http://www.medworm.com/index.php?rid=1845881&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2008%2F10%2Fchc-intelligence-article-now-press.html Shameless plug update of prior post. My article (McGrew, K. --- Editorial: CHC theory and the human cognitive abilities project: Standing on the shoulders of the giants of psychometric intelligence research" is now officially "in press" in Intelligence. A copy can be viewed at the following link. Until it is published, the formal citation should be:McGrew, K. S., CHC theory and the human cognitive abilities project: Standing on the shoulders of the giants of psychometric intelligence research, Intelligence (2008), doi:10.1016/j.intell.2008.08.004EnjoyTechnorati Tags: intelligence, Human Cognitive Abilities, WMF, CHC, Cattell-Horn-Carroll Theory, IQ, IQ tests, IQ scores, school psychology, educational psychology, cognition, neuropsychology, psychometrics (Source: Intelligent Insights on Int... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=1845881 Wed, 01 Oct 2008 20:37:00 +0100 1845881 http://www.medworm.com/index.php?rid=1715314&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2008%2F08%2Fin-press-chc-theory-overview-and-hca.html I'm pleased to announce that the following manuscript re: CHC (Cattell-Horn-Carroll ) theory and the Human Cognitive Abilities (HCA) project is now "in press" in the journal Intelligence. Readers may be particularly interested in the CHC Theory model figure (Figure 1) which represents the most comprehensive overview of contemporary CHC theory.McGrew, K. S. (in press). CHC Theory and the Human Cognitive Abilities Project: Standing on the Shoulders of the Giants of Psychometric Intelligence Research. Intelligence.As per the the Scholary Posting provision of the journals publication agreement, I've made a pre-publication copy of the submitted manuscript available at the HCA Archive web page (it can be found on the "HCA Project Communications and Announcements" branch).Technorati Tags: psychol... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=1715314 Thu, 14 Aug 2008 14:51:00 +0100 1715314 http://www.medworm.com/index.php?rid=1715319&cid=t_189767_122_f&fid=37835&url=http%3A%2F%2Fintelligencetesting.blogspot.com%2F2008%2F08%2Fwmf-human-cognitive-abilities-hca.html The free on-line WMF Human Cognitive Abilities (HCA) archive project was updated today. The major updates included the following:New datasets: A number of new datasets (correlation matrices analyzed in Carroll's 1993 factor analysis meta-analysis) and original journal articles were added to the archive. Nine new correlation matrices were added to the archive. They are listed below.BACH01: Bachman, L.F. (1982). The trait structure of cloze test scores. TESOL Quarterly, 16, 61-70.BAIR01: Bair J.T. (1951). Factor analysis of clerical aptitude tests. Journal of Applied Psychology, 35, 245-249.BANN11: Bannatyne, A.D., Wichiarajote, P. (1969). Relationships between written spelling, motor functioning, and sequencing skills. Journal of Learning Disabilities, 2, 4-16.BECH01: Bechtold, H.P. (19... Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) blogs http://www.medworm.com/rss/comments.php?id=1715319 Mon, 11 Aug 2008 16:17:00 +0100 1715319