Abstract
ABSTRACTTwo samples of National Merit Scholarship participants tested in 1962 and the entire population of almost 800,000 participants tested in 1965 were examined. Consistent effects in all three groups were observed with respect to both birth order and family size (firstborn and those of smaller families scoring higher). Control of both socioeconomic variables and mother's age (by analysis of variance as well as by analysis of covariance) failed to alter the relationships. Step‐down analyses suggested that the effects were due to a verbal component and that no differences were attributable to nonverbal factors. Detailed sibship configurations based on birth order, family size, sibling spacing, and sibling sex were developed for both sexes. The resulting 82 different sibship configurations were ranked by test score means. A rank‐order correlation between sexes yielded a very high value of .96, and a high correlation was shown to persist within family size.
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.
