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Samenvatting SPSS aansturingen Psychometrie en besliskunde
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Alle aansturingen voor SPSS die je nodig hebt voor de VSO.
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By: liekehooghiem1 • 10 months ago
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1VSO: SPSS tentamen
College 3/4
Itemanalyses
Analyze Descriptive Statistics Frequencies
Output
Valid Percent = P-waarde
In het geval van missings niet meetellen
Deze moet je vaak zelf nog omzetten naar gecorrigeerde p-waardes
Let op: P waarde is altijd onder de 1
Toetsitems hercoderen naar dichotome items
o Fout = 0
o Goed =1
Transform Recode into different Variables
Old and New Values (invullen: Value goede antwoord = 1/ Value alle
foute antwoorden (All other values) = 0) Change
Je kan ervoor kiezen om alle Missings, Missings te laten blijven
System missing System missing
Druk eerst op paste zodat je snel alle items kan aanpassen door kopiëren en plakken
Itemtotaalcorrelatie berekenen
Analyze Correlate Bivariate
Gehercodeerde dichotome item samen met SOMgoed (variabel aanmaken via
Compute Variable van de som dichtome items)
Itemrestcorrelatie berekenen
Analyze Correlate Bivariate
Itemrest = correlatie dichotome item met itemrest.
o Itemrest: gehercodeerde dichotome items optellen behalve het item waar je
de restscore voor wil bepalen
Via paste zodat je sneller kan aansturen:
, 2
Syntax voorbeeld itemrestcorrelatie variabelen creëren:
- SOMgoed = item1di + item2di + item3di
- Restitem1 = item2di + item3di
- Restitem 2 = Item1di + item3di
- Restitem 3 = Item1di + item2di
ICC maken
Graphs Legacy Diaglogs Line
Simple/ Summaries for groups of cases Define
Line Represents Other statistics (e.g., mean)
Dichtome variabele toevoegen bij ‘Variable’
Category Axis (x-as) SOMgoed invullen
Dubbel klikken voor referentie lijn options Y-as Reference Line Attach label
to line
Scale axis positio 0.5
Phi-coëfficiënt
Kruistabel maken
Analyze Descriptive Statistics Crosstabs
Statistics Phi and Cramer’s V
Z-scores berekenen
Analyze > Descriptive Statistics Descriptives
- Save standardized values as variables
Komt nu als variabele in je dataset te staan
Percentielscores berekenen
Transform Rank Cases
Rank Types Fractional rank as % (optie ‘Rank’ uitzetten)
Genormaliseerde scores berekenen
Transform Rank Cases
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