Just found this new article that presents data supporting a environmental cause of the Flynn effect (level of literacy). 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.net
Marks, D. F. (2010). IQ VARIATIONS ACROSS TIME, RACE, AND NATIONALITY: AN ARTIFACT OF DIFFERENCES IN LITERACY SKILLS. Psychological Reports, 106(3), 643-664.
Technorati Tags: psychology, forensic psychology, forensic psychiatry, neuropsychology, intelligence, school psychology, psychometrics, educational psychology, IQ, IQ tests, IQ scores, adaptive behavior, adaptive functioning, intellectual disability, mental retardation, MR, ID, criminal psychology, criminal defense, criminal justice, ABA, American Bar Association, Atkins cases, death penalty, capital punishment, AAIDD, Atkins MR/ID listserv, ICDP blog, Flynn effect, Flynn effect archive, CHC intelligence theory, CHC, Cattell-Horn-Carroll, literacy and IQ
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.net
Marks, 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 IQ collected over 50 years has revealed that average population IQ varies across time, race, and nationality. An explanation for these differences may be that intelligence test performance requires literacy skills not present in all people to the same extent. In eight analyses, population mean full scale IQ and literacy scores yielded correlations ranging from .79 to .99. In cohort studies, significantly larger improvements in IQ occurred in the lower half of the IQ distribution, affecting the distribution variance and skewness in the predicted manner. In addition, three Verbal subscales on the WAIS show the largest Flynn effect sizes and all four Verbal subscales are among those showing the highest racial IQ differences. This pattern of findings supports the hypothesis that both secular and racial differences in intelligence test scores have an environmental explanation: secular and racial differences in IQ are an artifact of variation in literacy skills. These findings suggest that racial IQ distributions will converge if opportunities are equalized for different population groups to achieve the same high level of literacy skills. Social justice requires more effective implementation of policies and programs designed to eliminate inequities in IQ and literacy.
Technorati Tags: psychology, forensic psychology, forensic psychiatry, neuropsychology, intelligence, school psychology, psychometrics, educational psychology, IQ, IQ tests, IQ scores, adaptive behavior, adaptive functioning, intellectual disability, mental retardation, MR, ID, criminal psychology, criminal defense, criminal justice, ABA, American Bar Association, Atkins cases, death penalty, capital punishment, AAIDD, Atkins MR/ID listserv, ICDP blog, Flynn effect, Flynn effect archive, CHC intelligence theory, CHC, Cattell-Horn-Carroll, literacy and IQ
