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Aantekeningen hoorcolleges ECO universiteit Leiden

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Dit document bevat aantekeningen van alle 8 hoorcolleges binnen het vak Experimenteel en correlationeel onderzoek aan de universiteit Leiden. Ik heb dit vak met een 7,0.

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  • August 19, 2021
  • 21
  • 2020/2021
  • Class notes
  • Hemmo smit
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Carmen

leiden
psych
Jaar 1
2021

,Week 1 Correlaties en maten voor effect grootte

causaliteit effect

is er een


1
covariatie : variabelen moeten samenhangen
>
direction aliteit :
oorzaak gaat vooraf aan
gevolg
uitsluiten alternatieve
verklaringen
>
interne validiteit :




x.otter plots




[ hele zwakke samenhang


covariatie =
de mate waarin twee variabelen variëren




nadeel →

moeil k interpreteren ; waarde is afhankel k van meeteenheid

oplossing
:

Sexy standaardiseren -

Pearson correlatie


Pearson correlatie ( r )
lineair verbond
alleen
geschikt b eerst Scotia plot
c. →



tussen -
T dt 1
<
lineair verbond tussen twee kwantitatieve variabelen




voordeel
makkel k interpreteren
:




ij ij ij

, factoren die Pearson berekenen
1) niet lineaire verbanden

plotten Óók ( niet verw deren ! ! )
{ heterogene
uitb ters i data zonder
uitb ters
subgroepen
'

2- score st.de berekenen :Hxi-µ)'
gemiddelde
}

hoeveel st du . van

onder
gemiddelde 2x of 2g berekenen X
µ/ 0
• - =
- -




boven
gemiddelde
+ →




alternatieve correlatie coefficienten




kwantitatief getalswaarde =



en
leeft d lengte schoenmaat
. ,




geen bepaalde
ordinaal :




afstand tussen
niveaus
dichotoom =
2 opties
en :
gave
( 2x 2 kruistabel)
speur man 's Rio ( Rs )
b Rpb



Ordinale variabelen Vb
hoogst afgeronde opleiding
° → :





omgezet in
rangnummers





voordeel t.o.v. Pearson R




punt bis er iele correlatie
-
( Rpr )




ij ijij ij

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