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ERIC Number: EJ821845
Record Type: Journal
Publication Date: 2009
Pages: 9
Abstractor: As Provided
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0160-2896
What Has Caused the Flynn Effect? Secular Increases in the Development Quotients of Infants
Lynn, Richard
Intelligence, v37 n1 p16-24 Jan-Feb 2009
Results of five studies show that during the second half of the twentieth century there were increases in the Development Quotients (DQs) of infants in the first two years of life. These gains were obtained for the Bayley Scales in the United States and Australia, and for the Griffiths Test in Britain. The average of 19 data points is a DQ gain of approximately 3.7 DQ points per decade. Similar gains of approximately 3.9 IQ points per decade have been present among preschool children aged 4-6 years. These gains are about the same as the IQ gains of school age students and adults on the Wechsler and Binet tests. This suggests that the same factor has been responsible for all these secular gains. This rules out improvements in education, greater test sophistication, etc. and most of the other factors that have been proposed to explain the Flynn effect. It is proposed that the most probable factor has been improvements in pre-natal and early post-natal nutrition. (Contains 3 tables.)
Elsevier. 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Tel: 877-839-7126; Tel: 407-345-4020; Fax: 407-363-1354; e-mail: usjcs@elsevier.com; Web site: http://www.elsevier.com
Publication Type: Journal Articles; Reports - Research
Education Level: Preschool Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Bayley Scales of Infant Development; United States; Australia; Griffiths Mental Development Scales; Great Britain; Wechsler Adult Intelligence Scale; Wechsler Intelligence Scale for Children; Stanford Binet Intelligence Scale