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Academic interests

My PhD project addresses the content side in the science assessment of the large-scale study Trends in International Mathematics and Science Study (TIMSS). Most educational research has largely taken the achievement scores as a given, and used e.g. "science achivement" as measured in standardized assessments as outcome variable in correlational studies. In contrast to looking (merely) at the student and class-side of the item response equation, my project looks at what characteristics of the items can explain why some content is more difficult than others. Key concepts in this research are opportunity to learn, curriculum alignment, and within-domain characteristics, and topic difficulty. Key methods for exploring these issues include explanatory item response models (see e.g. de Boeck and Wilson, 2004).

My main supervisor is Professor Dr Johan Braeken, and my co-supervisor is Dr Trude Nilsen. The period provided for my research is 2014-2018.


  • MSc in Social Research Methods and Statistics, University of Manchester, UK
  • MSc in International Development and Humanitarian Emergencies, London School of Economics (LSE), UK
  • Bachelor in Arabic, University of Bergen, Norway

    Conference presentations and posters


    • Intro to R at UiO (February, 2018)
    • Item Response Theory at Høyskolen i Oslo og Akershus (January, 2016)
    • Data Management at UiO, (September, 2015)


    • Daus, Stephan & Braeken, Johan (2018). The sensitivity of TIMSS country rankings in science achievement to differences in opportunity to learn at classroom level. Large-scale Assessments in Education.  ISSN 2196-0739.  6(1) . doi: 10.1186/s40536-018-0054-1 Full text in Research Archive. Show summary
    • Daus, Stephan; Nilsen, Trude & Braeken, Johan (2018). Exploring content knowledge: Country profile of science strengths and weaknesses in TIMSS. Possible implications for educational professionals and science research.. Scandinavian Journal of Educational Research.  ISSN 0031-3831.  s 1- 19 . doi: 10.1080/00313831.2018.1478882 Full text in Research Archive. Show summary

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    • Daus, Stephan (2019). Profiling and Researching TIMSS by Introducing a Content Lens on Eighth-grade Science (PARTICLES). Doktoravhandlinger forsvart ved Det utdanningsvitenskapelige fakultet, Universitetet i Oslo. 305. Show summary
    • Daus, Stephan (2019). Profiling and Researching TIMSS by Introducing a Curriculum-Lens on Eighth-grade Science (PARTTICLES).
    • Daus, Stephan (2019). TIMSS subject matter: What do teachers cover in classrooms across grades?.
    • Daus, Stephan; Aamodt, Per O & Tømte, Cathrine Edelhard (2019). Profesjonsfaglig digital kompetanse i lærerutdanningene : Undersøkelse av tilstand, holdninger og ferdigheter ved fem grunnskolelærerutdanninger. NIFU-rapport. 13. Show summary
    • Daus, Stephan; Fevolden, Arne Martin; Østby, Mona Nedberg & Mark, Michael Spjelkavik (2019). Indikatorer for digital deltakelse og kompetanse i den voksne befolkningen : Vurderinger av rammeverk, eksisterende datakilder og nye indikatorer. NIFU Arbeidsnotat. 8. Show summary
    • Daus, Stephan; Stancel-Piatak, Agnes & Braeken, Johan (2019). Curriculum sensitivity of the TIMSS science test: Adjacent-grades within schools design.
    • Rogde, Kristin; Daus, Stephan; Pedersen, Cathrine; Vaagland, Karin & Federici, Roger Andre (2019). Spørsmål til Skole-Norge : Analyser og resultater fra Utdanningsdirektoratets spørreundersøkelse til skoler og skoleeiere våren 2019. NIFU-rapport. 8. Show summary
    • Sandsør, Astrid Marie Jorde; Daus, Stephan; Pedersen, Cathrine; Reiling, Rune Borgan; Salvanes, Kari Vea; Skålholt, Asgeir & Vennerød-Diesen, Frida Felicia (2019). Evaluering av norm for lærertetthet : NIFUs løsningsbeskrivelse for evaluering av norm for lærertetthet. NIFU Arbeidsnotat. 19. Show summary
    • Daus, Stephan (2018). Out of tune: Can we hear a bas(i)s for Norway’s decision to move its tested populations one grade up in TIMSS?.
    • Daus, Stephan; Stancel-Piatak, Agnes & Braeken, Johan (2018). Instructional sensitivity of the TIMSS items and test to Norwegian science education instruction.
    • Daus, Stephan & Braeken, Johan (2017). Are TIMSS country scores and rankings sensitive to varying opportunities to learn?.
    • Daus, Stephan (2016). Diving deeper into 'opportunity to learn': Does the 'opportunity to learn'-effect depend upon the content learned and the teacher?.
    • Daus, Stephan (2016). Explaining Difficulties in Large-Scale Assessments: Digging deeper into factors influencing the difficulty of content groups in TIMSS..
    • Daus, Stephan (2016). Exploring Science Content Knowledge: Science Difficulties for Norwegian Pupils in TIMSS.
    • Daus, Stephan (2015). Explanatory Item Response Theory in Large-Scale Science Assessments.
    • Daus, Stephan; Nilsen, Trude & Braeken, Johan (2015). Explaining Item Difficulty Heterogeneity Across Content Groups with Curricular Coverage.

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    Published Oct. 14, 2014 4:23 PM - Last modified May 23, 2019 1:49 PM


    No ongoing projects