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Saturday, January 30, 2021
Monday, January 25, 2021
James R. Flynn, Who Found We Are Getting Smarter, Dies at 86
James R. Flynn, Who Found We Are Getting Smarter, Dies at 86
https://flip.it/HQ6wrM
https://flip.it/HQ6wrM
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Kevin S. McGrew, PhD
Educational & School Psychologist
Director
Institute for Applied Psychometrics (IAP)
https://www.themindhub.com
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Kevin S. McGrew, PhD
Educational & School Psychologist
Director
Institute for Applied Psychometrics (IAP)
https://www.themindhub.com
******************************************
The secular trend of intelligence test scores in the present century: The Danish experience - ScienceDirect
The secular trend of intelligence test scores in the present century: The Danish experience - ScienceDirect
https://www.sciencedirect.com/science/article/abs/pii/S016028962100009X
Highlights
•
Changes in mean intelligence test scores were minimal in Denmark in 2006–2019.
•
A change in the format of the intelligence test resulted in a sudden drop in scores.
•
Neither changes in parental age, dysgenics, or immigration can explain the findings.
•
Changes in sample composition may conceal a true decline in intelligence test scores.
Abstract
The present register-based study investigated the secular trend of intelligence test scores during the period from 2006 through 2019 in a Danish population-representative sample, as well as whether the observed trend could be explained by changes in parental age, dysgenics, and immigration or changes in the format of the intelligence test and sample characteristics. The study population consisted of all Danish men appearing before a draft board during the study period (N = 400,288). Intelligence test scores were obtained by the use of Børge Priens Prøve, typically at age 19. For each of the included draft board cohorts, the intelligence test score mean and standard deviation were estimated. The results showed that changes in mean intelligence test scores were minimal during the study period. A slight decline was observed from 2006 to 2010. Furthermore, there was a drop of 1.5 IQ points from 2010 to 2011, which coincided with the change in the format of the intelligence test from paper-and-pencil to computer-based, but there was essentially no change after 2011. Neither changes in parental age, dysgenics, or immigration seem to have influenced the observations. However, changes in sample composition may conceal a true decline in intelligence test scores given that a larger proportion of individuals with low intelligence seems to be exempted from testing. In conclusion, the study findings suggest no systematic change in intelligence test scores during the last decade, but due to changes in sample composition, it cannot be excluded that there has been a negative secular trend.
https://www.sciencedirect.com/science/article/abs/pii/S016028962100009X
Highlights
•
Changes in mean intelligence test scores were minimal in Denmark in 2006–2019.
•
A change in the format of the intelligence test resulted in a sudden drop in scores.
•
Neither changes in parental age, dysgenics, or immigration can explain the findings.
•
Changes in sample composition may conceal a true decline in intelligence test scores.
Abstract
The present register-based study investigated the secular trend of intelligence test scores during the period from 2006 through 2019 in a Danish population-representative sample, as well as whether the observed trend could be explained by changes in parental age, dysgenics, and immigration or changes in the format of the intelligence test and sample characteristics. The study population consisted of all Danish men appearing before a draft board during the study period (N = 400,288). Intelligence test scores were obtained by the use of Børge Priens Prøve, typically at age 19. For each of the included draft board cohorts, the intelligence test score mean and standard deviation were estimated. The results showed that changes in mean intelligence test scores were minimal during the study period. A slight decline was observed from 2006 to 2010. Furthermore, there was a drop of 1.5 IQ points from 2010 to 2011, which coincided with the change in the format of the intelligence test from paper-and-pencil to computer-based, but there was essentially no change after 2011. Neither changes in parental age, dysgenics, or immigration seem to have influenced the observations. However, changes in sample composition may conceal a true decline in intelligence test scores given that a larger proportion of individuals with low intelligence seems to be exempted from testing. In conclusion, the study findings suggest no systematic change in intelligence test scores during the last decade, but due to changes in sample composition, it cannot be excluded that there has been a negative secular trend.
Thursday, January 21, 2021
Webinar on new AAIDD classification manual
https://www.aaidd.org/education/event-details/2021/01/28/default-calendar/intellectual-disability-definition-diagnosis-classification-and-systems-of-supports-12th-edition
******************************************************
Kevin McGrew, PhD
Educational Psychologist
Director, Institute for Applied Psychometrics
IAP
www.themindhub.com
******************************************************
Tuesday, January 19, 2021
AAIDD Announces the Publication of the 12th Edition of its Manual
https://www.aaidd.org/news-policy/news/article/2021/01/15/aaidd-announces-the-publication-of-the-12th-edition-of-its-manual
Friday, January 15, 2021
12th Edition of the AAIDD Manual Now Available!
Intellectual Disability: Definition, Diagnosis, Classification, and Systems of Supports, 12th Edition, has just been published and can be purchased from our bookstore.
All professionals in the field need this important reference book, which integrates the findings and developments of the last 10 years in a systematic approach to diagnosis, optional subgroup classification, and planning of systems of supports for people with ID.
In addition, the 12th edition examines the construct of age of onset as a criterion in diagnosis and presents the operational definition in a way that will be critically important to professionals in the field.
Buy your copy now in the AAIDD Bookstore!
To explore our other titles, visit our online bookstore by clicking here.
Members get even more savings!
Join or Renew AAIDD Membership for Journal Access and Discounts
on All AAIDD Books & Curriculum**Members: Login for your member discount to also be applied at checkout**
American Association on Intellectual
and Developmental Disabilities (AAIDD)
8403 Colesville Road, Suite 900
Silver Spring, MD 20910
Telephone: 202-387-1968
Fax: 202-387-2193
www.aaidd.org
This email was sent to iap@earthlink.net by books@aaidd.orgAmerican Association on Intellectual and Developmental Disabilities • 8403 Colesville Road, Suite 900, Silver Spring, Maryland 20910, United States
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