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ATT HJÄLPA ELLER STJÄLPASANNOLIKHETSBEDÖMNINGAR:KONJUNKTIONSREGELN OCH MENTALARBETSBELASTNING SOM MEDIERANDEFAKTORER
Umeå University, Faculty of Social Sciences, Department of Psychology.
Umeå University, Faculty of Social Sciences, Department of Psychology.
2017 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [sv]

Den här studien syftade till att undersöka om mental arbetsbelastning kan påverka benägenhetenatt begå konjunktionsfelet vid sannolikhetsbedömningar, trots att man fått ledtrådarsom synliggjort konjunktionsregeln. Detta undersöktes med en experimentell mellangruppsdesign.I studien deltog 57 deltagare, varav 27 i experimentgruppen och 30 i kontrollgruppen.Deltagarna var i huvudsak studenter på universitetsnivå. Grupperna hade en jämn könsfördelning.Vad gäller ålder så var medelvärdet i kontrollgruppen 24.8 och medelvärdet i experimentgruppenvar 30.7. Samtliga deltagare fick utföra ett datorbaserat test. Båda gruppernastest bestod av sannolikhetsbedömningsuppgifter, felstavningsuppgifter, samt en tilläggsuppgiftdär deltagarna ombads ange om ett visst ord förekommit i tidigare fråga eller ej. Experimentbetingelseninnehöll dessutom en visuospatial arbetsminnesuppgift. Resultatet visade attmental arbetsbelastning inte ökade antalet konjunktionsfel vid sannolikhetsbedömningar dådeltagarna fått ledtrådar som synliggjort konjunktionsregeln. Slutsatsen visar att det inte behövervara mer resurskrävande för arbetsminnet att göra normativa bedömningar och att tillgodogörandetav konjunktionsregeln är robust mot mental arbetsbelastning. Framtida forskningskulle kunna undersöka vilken betydelse ett visst antal ledtrådar har för om tillgodogörandetav konjunktionsregeln påverkas av mental arbetsbelastning.

Abstract [en]

The aim of this study was to investigate whether mental workload can affect the tendency tocommit the conjunction fallacy in probability assessments, despite having read clues that exposethe conjunction rule. This was investigated with an experimental between-group design.In total, the study had 57 participants, whereof 27 in the experiment group and 30 in the controlgroup. The groups were equally balanced concerning sex. The average age in the controlgroup was 24.8 years compared to 30.7 years in the experiment group. All participants performeda computer-based test. Both groups’ test consisted of tasks with probability assessments,discovering misspelled words and an additional task about estimating whether a certainword had occurred during the previous task. The experimental condition also consisted ofa visuo-spatial working memory task. The result indicated that mental workload did not increasethe number of conjunction fallacies committed in probability assessments, given thatthe participants had read clues that expose the conjunction rule. From this result, the conclusionis drawn that normative judgments are not necessarily more demanding for the workingmemory, also that the utilization of the conjunction rule is resistant to mental workload. Futureresearch might investigate what impact a certain number of clues has for whether theutilization of the conjunction rule is affected by mental work load.

Place, publisher, year, edition, pages
2017.
Keywords [en]
heuristics, the conjunction rule, probability assessments, working memory, mental workload, dual process theory, single-process theory, nested-set view.
Keywords [sv]
heuristik, konjunktionsregeln, sannolikhetsbedömningar, arbetsminne, mental arbetsbelastning, dualprocessteori, enkelprocessteori, nested-sets view.
National Category
Psychology
Identifiers
URN: urn:nbn:se:umu:diva-143404OAI: oai:DiVA.org:umu-143404DiVA, id: diva2:1168831
Presentation
, Umeå (Swedish)
Supervisors
Examiners
Available from: 2017-12-22 Created: 2017-12-21 Last updated: 2017-12-22Bibliographically approved

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