Birth order does not have enduring effects on personality!

 

PAPER: Birth order and personality: A within-family test using independent self-reports from both firstborn and laterborn siblings

Abstract
Assumptions about the effects of birth order on personality abound in popular culture and self-help books. Indeed, when one sibling is asked to compare themselves to others in their family, birth order shows weak-to-moderate effects on personality. No study to date, however, has utilized a complete within-family design that includes independent self-reports from both firstborn and laterborn siblings in the same family. To fill this gap, we collected Big Five personality data on 69 young adult firstborn–laterborn sibling pairs. We also obtained data from parents of the sibling pairs and peer ratings of original participants’ personality traits. Within-family analyses revealed that neither siblings’ independent self-reported personality traits, nor parents’ reports of their children’s personality traits, differed systematically as a function of birth order. Our findings are consistent with results from between-family designs and they provide further evidence, employing a within-family design that utilizes data from multiple family members, that birth order does not have enduring effects on personality.

MatchWise, Chemistry, PlentyOfFish Chemistry Predictor, eVow, TeAmoRu  and other sites use/used the Birth Order Item, but it is useless at all for Serious Online Dating!


Please remember: Personality traits are highly stable in persons over 25 years old to 45 years old.


WorldWide, there are over 5,000 -five thousand- online dating sites
but no one is using the 16PF5 (or similar) to assess personality of its members!
but no one calculates similarity with a quantized pattern comparison method!
but no one can show Compatibility Distribution Curves to each and every of its members!
but no one is scientifically proven!
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What comes after the Social Networking wave?
The Next Big Investment Opportunity on the Internet will be .... Personalization!
Personality Based Recommender Systems and Strict Personality Based Compatibility Matching Engines for serious Online Dating with the normative 16PF5 personality test.