Abstract
When IQ tests are ranked by the magnitude of their score gains over time, this hierarchy lacks a positive correlation with the same tests ranked by their g loadings. Therefore, Jensen declared IQ gains “hollow” and, by implication, extended this judgment to score gains that indicated that blacks had made IQ gains on whites. We offer four exploratory meta-analyses that apply Jensen's method to the subtest score differences between normal subjects and those suffering from certain afflictions: iodine deficiency (K=6, N=196), prenatal cocaine exposure (K=2, N=215), fetal alcohol syndrome and degree of fetal alcohol syndrome (respectively, K=1, N=110; and K=3, N=125), and traumatic brain injury (K=14, N=629). All of these create a substantial cognitive deficit in those afflicted. However, the correlations between subtest score differences and g loadings run from −0.23 to +0.12, with an unweighted average of 0.00.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
