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Statistische opdracht Observation Skills (observatieweek)
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Statistische opdracht van de observatieweek (deel A en deel B). Ik heb zelf een 8.3 gehaald voor deze opdracht.
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Naam: Studentnummer: Tutor:Statistische opdracht
Deel A
1. De interbeoordelaarsbetrouwbaarheid voor de frustratie scores wordt berekend met Cohen’s
kappa. Dit wordt berekend met Cohen’s kappa, omdat de frustratie score nominaal gemeten
wordt (ja/nee). De variabele wordt nominaal gemeten, omdat de waarden kwalitatief zijn en er
slechts categorieën zonder verschillen aan te duiden zijn. Tevens zijn er enkel twee
observatoren (de onderzoeker en de onderzoeksassistent), wat een vereiste is om Cohen’s
kappa te gebruiken.
2. Via SPSS heb ik de volgende stappen genomen om de interbeoordelaarsbetrouwbaarheid
met Cohen’s kappa te berekenen:
Analyze > Descriptive Statistics > Crosstabs > ‘res_frus’ naar column > ‘ass_frus’ naar row
> Statistics > ‘Kappa’ aanvinken > Continue > OK.
Cohen’s kappa is κ = .838. Wanneer κ tussen 0.80 en 1.00 ligt, betekend dit dat er bijna
perfecte overeenstemming is tussen de twee observatoren. Dit betekend dat de eerste
hypothese gewoon getest kan worden.
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