Document Detail

Birth order has no effect on intelligence: a reply and extension of previous findings.
MedLine Citation:
PMID:  17933740     Owner:  NLM     Status:  MEDLINE    
We address points raised by Zajonc and Sulloway, who reject findings showing that birth order has no effect on intelligence. Many objections to findings of null birth-order results seem to stem from a misunderstanding of the difference between study designs where birth order is confounded with true causal influences on intelligence across families and designs that control for some of these influences. We discuss some of the consequences of not appreciating the nature of this difference. When between-family confounds are controlled using appropriate study designs and techniques such as multilevel modeling, birth order is shown not to influence intelligence. We conclude with an empirical investigation of the replicability and generalizability of this approach.
Aaron L Wichman; Joseph Lee Rodgers; Robert C Maccallum
Publication Detail:
Type:  Comment; Journal Article     Date:  2007-07-26
Journal Detail:
Title:  Personality & social psychology bulletin     Volume:  33     ISSN:  0146-1672     ISO Abbreviation:  Pers Soc Psychol Bull     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-10-15     Completed Date:  2007-11-27     Revised Date:  2011-02-10    
Medline Journal Info:
Nlm Unique ID:  7809042     Medline TA:  Pers Soc Psychol Bull     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1195-200     Citation Subset:  IM    
The Ohio State University, USA.
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MeSH Terms
Birth Order*
Family Characteristics*
Models, Theoretical*
United States
Comment On:
Pers Soc Psychol Bull. 2007 Sep;33(9):1187-94   [PMID:  17586733 ]

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