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Volledige samenvatting Methoden en onderzoek Deel 1

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Samenvatting van de volledige cursus van methoden en onderzoek deel 1

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1 Basisconcept........................................................................................................................................4
1.1 Karakteristieken............................................................................................................................4

1.2 Doel..............................................................................................................................................4

1.3 Beperkingen..................................................................................................................................4

2 Onderzoeksopzet.................................................................................................................................4
2.1 Grote lijnen...................................................................................................................................4

2.2 Stappen onderzoekscyclus............................................................................................................5

2.3 Onderzoeksvraag- en doel............................................................................................................5

2.3.1 Idee naar probleemstelling tot onderzoeksvraag..................................................................5

2.3.2 Alternatieve en nulhypothese................................................................................................6

2.4 Voorbereidend literatuuronderzoek.............................................................................................6

2.5 Studiedesign aanpassen aan onderzoeksdoel..............................................................................6

3 Kwantitatieve benadering....................................................................................................................7
3.1 Soorten studiedesigns..................................................................................................................7

3.1.1 Experimenteel........................................................................................................................7

3.1.1.1 RCT..................................................................................................................................7

3.1.2 Observationeel......................................................................................................................8

3.1.2.1 Cohort-onderzoek...........................................................................................................8

3.1.2.2 Case-control onderzoek..................................................................................................8

3.1.2.3 Dwarsdoorsnede of cross-sectioneel onderzoek............................................................8

3.1.2.4 Ecologisch of correlatieonderzoek..................................................................................8

3.1.2.5 Case reports, case studie of gevallenbeschrijving...........................................................8

3.2 Verzamelen gegevens...................................................................................................................8

3.2.1 Populatie en steekproef.........................................................................................................8

3.2.2 Interventiegroep en controlegroep.......................................................................................9

3.2.3 Variabelen............................................................................................................................10

3.2.4 Type variabelen...................................................................................................................10

3.2.5 Validiteit, betrouwbaarheid en reproduceerbaarheid.........................................................10

3.2.6 Confounding of verstorende factoren.................................................................................11

1

, 3.3 Analyseren gegevens..................................................................................................................11

3.3.1.1 Kwantitatieve continue variabelen...............................................................................11

3.3.1.2 Kwalitatieve categorische variabelen (ordinaal, nominaal, dichotoom).......................12

3.3.2 Exploreren verbanden tussen data......................................................................................12

3.3.2.1 Frequentiematen..........................................................................................................12

3.3.2.2 Associatiematen............................................................................................................12

3.3.2.3 Correlatie......................................................................................................................13

3.3.2.4 Toetsen.........................................................................................................................13

3.3.2.4.1 Belangrijke toetsen binnen medische statistiek....................................................14

3.3.3 Interpretatie en conclusie....................................................................................................14

3.4 Rapporteren...............................................................................................................................14

4 Kwalitatieve benadering....................................................................................................................15
4.1 Verzamelen gegevens.................................................................................................................15

4.1.1 Interview..............................................................................................................................15

4.1.2 Participerende observatie....................................................................................................15

4.1.3 Focusgroep gesprekken.......................................................................................................16

4.1.4 Document analyse...............................................................................................................16

4.2 Methodologische criteria............................................................................................................16

4.2.1 Validiteit..............................................................................................................................16

4.2.2 Betrouwbaarheid.................................................................................................................16

4.3 Procedure van dataverzameling en opslaan...............................................................................17

4.4 Coderen en analyseren...............................................................................................................17

4.4.1 Computer software..............................................................................................................17

4.4.2 Theoretische modellen........................................................................................................17

4.4.3 Coderen zelf.........................................................................................................................18

4.5 Rapporteren...............................................................................................................................18

5 Ethische aspecten en onderzoek.......................................................................................................19
5.1 Informed consent.......................................................................................................................19

5.2 Privacy........................................................................................................................................19

2

,3

,1 Basisconcept
 Deductief
o Top-down
o Vooronderstellen
 Inductief
o Bottom-up
o Waarnemen (maar is niet altijd waarheid)

1.1 Karakteristieken
 Systematisch
o Probleem  plan  info verzamelen 
beschrijven/verklaren/voorspellen/beheersen
 Controle
o Controleerbaar en reproduceerbaar
 Generaliseerbaarheid
o Mate waarin kleine onderzoeken naar volledige populatie kan doorgetrokken
worden

1.2 Doel
 Algemeen
o Toename van kennis
 Specifiek
o Beschrijvend of descriptief onderzoek
o Exploratie (relaties ontdekken)
o Verklaren adhv inferentiële analyse
o Toetsend of meta-analyserende onderzoeken

1.3 Beperkingen
 Tijd
 Financiële middelen
 Omvang steekproef  niet altijd ideaal
 Ethisch en moreel
 Complexiteit mens

2 Onderzoeksopzet
2.1 Grote lijnen
 Conceptdiagram adhv inductief redeneren
o Hypothese wordt constant getoetst  verwerpen of niet?


4

, o Moeten vooraf een zekerheidsdrempel kiezen

2.2 Stappen onderzoekscyclus
Vaste structuur voor elk onderzoek:
1. Probleemstelling + formuleren onderzoeksvraag/hypothese
2. Literatuuronderzoek
a. Wat reeds gekend over probleem?
3. Ontwerpen onderzoeksdesign
a. Hoe, welke type onderzoek op basis van vraag, tijd, middelen
4. Bepalen populatie + steekproeftrekking
a. Omschrijven populatie en bepalen welk deel we selecteren
5. Gegevensverzameling
6. Gegevensverwerking
a. Gegevens ordenen  analysemethode kiezen
7. Interpretatie resultaten
a. Vergelijken met gelijkaardige studies
8. Conclusie trekken
a. Nagaan overeenkomst vraag met resultaten
9. Publicatie

2.3 Onderzoeksvraag- en doel
Aanleiding vraag:
 Klinisch probleem
 Discussie
 Nieuw product
 Twijfelachtige literatuur

2.3.1 Idee naar probleemstelling tot onderzoeksvraag
Globale onderzoeksvraag


Specifieke onderzoeksvraag


Uiteindelijke onderzoeksvraag (helder, concreet en eenduidig) bevat:
 Probleem/populatie/patiëntengroep
 Verklarende factor
 Uitkomst
 Vergelijkende factor
 Tijdsfactor


5

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