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EXAMING THE EFFECTS OF BIRTH ORDER ON PERSONALITY, relationships in…

- - - - predictions for imagination and intellect (subscale of openess to expreiance) later borns higher on imagination ; first borns better on psychometric intelligence tests
        for specfic emotional stability items sulloway predicted firstborns to be more anxious and quicker to anger, and later borns to be more depressed, vulnerable,m self conc,.and implussive
      - his hypos have been p[roven but also sometimes on partily supported , or un supported ; this study aims to \
        
        use data with individual personaility assesments of sibs; 2 high power combining 3 national panels detect even small birth order effect
        
        3 birth order effect tested with between and within family design
  - - - seperatley analysed based on same sex sib pairs, restricting the age to for 1.5 to 5 yrs and still only found effect on intellegence and intellect (openness)
- - - - NLSY national longitudinal surtvery of youth 1997 cohort (NLSY united states) representative sample of US residents born during the years 1980–1984. Data collection for this panel study began in 1997 and included all household members between 12 and 16 y of age from randomly selected households.
        
        emotional stability analyzed further to test sulloways hypothesis that fristborns score higher on this speific item
        
        control for potential nonlinear age effects ; localy regressed each of the big five traits as the spefic item on age in the NLSY sample by using LOWESS prod. with a bandwidth of 0.5. Conversted the residuals from these regressions into t scores; which reflected personality scores after adjusting them for normative age trends
        
        2009 at age 29-35 ten item personality inventory two items for each big five dimension; scales accepted if no items were missing
      - SOEP (Germany) private households and their members; 1984 and has since been refreshed several times to
        ensure representativity
        
        2013 age 18-98 completed version of the BFI-S (40); 16 items, including 4 items for openness and 3 for each remained big five trait
        split openness items to attain three item measure of imagination and used forth item as measure of intellect
        no items missing; local regression used to attain age-adjusated t scores; same as NLSY
      - NCSD: national child development study (NCSD; great Britain); originated from the Perinatal Mortality Survey 1958 and tracks the life courses of all individuals born in Great Britain in 1958 in a particular week
        
        50 items from the international personality item pool (measure big five) t scores
        accepted if 9 out of 10 items answered for each trait
        used principal axis factor analysis with oblimin rotation on the ten items measuring openness to experiance ; extracting teo correlated factors
        supported by this and content- related considerations
        attained 5 item measure on self reported intellect and imagination
        two measures ; two items each; from the emotional stability scale
        "i get upset easily and "i get irritated easily" first borns hypo to score higher
        i often feel blue, i seldom feel blue later borns
        were hypo by sulloway to score higher
        
        assesed in 2008 at age 50;
    - - NLSY
        
        1997/1998; computure-adaptive form of the Armed Services Vocational Aptitude Battery
        IQ scores calc from age-senstive summary percentile score ining 59 items;
      - SOEP
        
        2013 with MWT-B multiple choice vocab test with 37 items ; used same logrssion procedure as NLSY ans SOEP personaliklity scores other two ; age-adjusted IQ scores
      - NCSD
        
        intellegence in 1969 (age 11); individual general ability test consisting of 40 verbal and 40 nonverbal items
        Iq scores based on the sum of two subtests
- - - - most cases socail = biological
      - no only child /twins
      - 4+ excluded less than 11% across combined samples
- - - - 5 subtests in fifth wave of IFLS, 15+ participated 1 . SF. Ravens matrices test (8 items) identifiy missing element out of (6) to complte a patten 2. count backwards from 100 in steps of 7 seconds 3. delayed word recall test - listen 10 nouns , recall 5 mins later 4. adaptive number serires test, had to guess missing value based on number pattern shown, first 3 items given to p's, based on accuracy of 1st 3 responses, subsequent set of three items is chosen. Rasch scoring model used to identify persons ability for given set of response patternws with varying levels of difficulty ; composite score 5. 15 - 59 math test consiting of 5 M/c measuring mathamatical abilties (3 word, 2 text)