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Njål Foldnes

Professor

Fakultet for utdanningsvitenskap og humaniora
Nasjonalt senter for leseopplæring og leseforsking
Bio

I am interested in multivariate methods used in social science research, mainly structural equation modeling, factor analysis and developing simulation methods for multivariate correlated data. 

My research involves proposing new methods for assessing model fit in SEM, critique of existing simulation methodologies and development of new ones. 

covsim package

Also, I have been working together with S Grønneberg on delineating the limits of ordinal SEM and proposing new estimators for ordinal data. 

Also, I lead a machine learning project aimed at early detection of struggling readers based on gameplay data from a literacy app for school starters. 

Gameplay machine learning project

 

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Publications
  • Vitenskapelige publikasjoner
    • Grønneberg, Steffen; Foldnes, Njål; Marcoulides, Katerina

      (2022)

      covsim: An R Package for Simulating Non-normal Data for Structural Equation Models Using Copulas.

      Journal of Statistical Software

      ISSN 1548-7660.

    • Foldnes, Njål; Grønneberg, Steffen

      (2021)

      The sensitivity of structural equation modeling with ordinal data to underlying non-normality and observed distributional forms.

      Psychological methods

      ISSN 1082-989X.

      DOI: 10.1037/met0000385

    • Foldnes, Njål; Grønneberg, Steffen

      (2021)

      Non-normal Data Simulation using Piecewise Linear Transforms.

      Structural Equation Modeling

      ISSN 1070-5511.

      s.1-12.

      DOI: 10.1080/10705511.2021.1949323

    • Billington, Mary Genevieve; Foldnes, Njål

      (2021)

      Exploring the association between occupational complexity and numeracy.

      Large-scale Assessments in Education

      ISSN 2196-0739.

      Volum 9.

      DOI: 10.1186/s40536-021-00112-6

    • Grønneberg, Steffen; Moss, Jonas; Foldnes, Njål

      (2020)

      Partial identification of latent correlations with binary data.

      Psychometrika

      ISSN 0033-3123.

      Volum 85.

      s.1028-1051.

      DOI: 10.1007/s11336-020-09737-y

    • Thomson, Jennifer Marie; Foldnes, Njål; Uppstad, Per Henning; Njå, Morten Bergsten; Solheim, Oddny Judith; Lundetræ, Kjersti

      (2020)

      Can children's instructional gameplay activity be used as a predictive indicator of reading skills?.

      Learning and Instruction

      ISSN 0959-4752.

      Volum 68.

      DOI: 10.1016/j.learninstruc.2020.101348

    • Grønneberg, Steffen; Foldnes, Njål

      (2019)

      A problem with discretizing Vale-Maurelli in simulation studies.

      Psychometrika

      ISSN 0033-3123.

      Volum 84.

      Hefte 2.

      s.554-561.

      DOI: 10.1007/s11336-019-09663-8

    • Marcoulides, Katerina; Foldnes, Njål; Grønneberg, Steffen

      (2019)

      Assessing Model Fit in Structural Equation Modeling Using Appropriate Test Statistics.

      Structural Equation Modeling

      ISSN 1070-5511.

      s.1-11.

      DOI: 10.1080/10705511.2019.1647785

    • Foldnes, Njål; Grønneberg, Steffen

      (2019)

      On Identification and Non-normal Simulation in Ordinal Covariance and Item Response Models.

      Psychometrika

      ISSN 0033-3123.

      Volum 84.

      Hefte 4.

      s.1000-1017.

      DOI: 10.1007/s11336-019-09688-z

    • Foldnes, Njål; Olsson, Ulf H.

      (2019)

      The choice of normal-theory weight matrix when computing robust standard errors in confirmatory factor analysis.

      Structural Equation Modeling

      ISSN 1070-5511.

      s.1-15.

      DOI: 10.1080/10705511.2019.1600408

    • Foldnes, Njål; Marcoulides, George A.; Olsson, Ulf H.

      (2019)

      Examining the Performance of the Modified ADF Goodness-of-fit Test Statistic in Structural Equation Models.

      Structural Equation Modeling

      ISSN 1070-5511.

      DOI: 10.1080/10705511.2019.1586545

    • Foldnes, Njål; Grønneberg, Steffen

      (2019)

      Pernicious Polychorics: The Impact and Detection of Underlying Non-normality.

      Structural Equation Modeling

      ISSN 1070-5511.

      DOI: 10.1080/10705511.2019.1673168

    • McTigue, Erin ; Solheim, Oddny Judith; Walgermo, Bente R.; Frijters, Jan; Foldnes, Njål

      (2019)

      How can we determine students' motivation for reading before formal instruction? Results from a self-beliefs and interest scale validation study.

      Early Childhood Research Quarterly

      ISSN 0885-2006.

      Volum 48.

      s.122-133.

      DOI: 10.1016/j.ecresq.2018.12.013

    • Walgermo, Bente R.; Foldnes, Njål; Uppstad, Per Henning; Solheim, Oddny Judith

      (2018)

      Developmental Dynamics of Early Reading Skill, Literacy Interest and Reader's Self-Concept Within the First Year of Formal Schooling.

      Reading and writing

      ISSN 0922-4777.

      Volum 31.

      Hefte 6.

      s.1379-1399.

      DOI: 10.1007/s11145-018-9843-8

    • Grønneberg, Steffen; Foldnes, Njål

      (2018)

      Testing Model Fit by Bootstrap Selection.

      Structural Equation Modeling

      ISSN 1070-5511.

      DOI: 10.1080/10705511.2018.1503543

    • Foldnes, Njål; Grønneberg, Steffen

      (2017)

      Approximating Test Statistics Using Eigenvalue Block Averaging.

      Structural Equation Modeling

      ISSN 1070-5511.

      Volum 25.

      Hefte 1.

      s.101-114.

      DOI: 10.1080/10705511.2017.1373021

    • Strand, Olaug; Wagner, Åse Kari H.; Foldnes, Njål

      (2017)

      Flerspråklige elevers leseresultater. I: Klar framgang! Leseferdighet på 4. og 5. trinn i et femtenårsperspektiv.

      Universitetsforlaget

      ISBN 9788215030241.

      s.75-95.

      DOI: 10.18261/9788215030258-2017-5

    • Foldnes, Njål; Grønneberg, Steffen

      (2017)

      The asymptotic covariance matrix and its use in simulation studies.

      Structural Equation Modeling

      ISSN 1070-5511.

      Volum 24.

      Hefte 6.

      s.881-896.

      DOI: 10.1080/10705511.2017.1341320

    • Grønneberg, Steffen; Foldnes, Njål

      (2017)

      Covariance Model Simulation Using Regular Vines.

      Psychometrika

      ISSN 0033-3123.

      Volum 82.

      Hefte 4.

      s.1035-1051.

      DOI: 10.1007/s11336-017-9569-6

    • Foldnes, Njål

      (2017)

      The impact of class attendance on student learning in a flipped classroom.

      Nordic Journal of Digital Literacy

      ISSN 1891-943X.

      Volum 12.

      Hefte 1-2.

      s.8-18.

      DOI: 10.18261/issn.1891-943x-2017-01-02-02

    • Steen-Utheim, Anna Therese; Foldnes, Njål

      (2017)

      A qualitative investigation of student engagement in a flipped classroom.

      Teaching in Higher Education

      ISSN 1356-2517.

      Volum 23.

      Hefte 3.

      s.307-324.

      DOI: 10.1080/13562517.2017.1379481

    • Foldnes, Njål

      (2016)

      The flipped classroom and cooperative learning: Evidence from a randomised experiment.

      Active Learning in Higher Education

      ISSN 1469-7874.

      Volum 17.

      Hefte 1.

      s.39-49.

      DOI: 10.1177/1469787415616726

    • Foldnes, Njål; Olsson, Ulf H.

      (2016)

      A simple simulation technique for non-normal data with pre-specified skewness, kurtosis and covariance matrix.

      Multivariate Behavioral Research

      ISSN 0027-3171.

      Volum 51.

      Hefte 2-3.

      s.207-219.

      DOI: 10.1080/00273171.2015.1133274

    • Foldnes, Njål; Olsson, Ulf

      (2015)

      Correcting too much or too little? The performance of three chi-square corrections.

      Multivariate Behavioral Research

      ISSN 0027-3171.

      Volum 50.

      Hefte 5.

      s.533-543.

      DOI: 10.1080/00273171.2015.1036964

    • Foldnes, Njål; Hagtvet, Knut Arne

      (2014)

      The Choice of Product Indicators in Latent Variable Interaction Models: Post Hoc Analyses.

      Psychological methods

      ISSN 1082-989X.

      Volum 19.

      Hefte 3.

      s.444-457.

      DOI: 10.1037/a0035728

    • Foldnes, Njål; Grønneberg, Steffen

      (2014)

      How general is the Vale-Maurelli simulation approach?.

      Psychometrika

      ISSN 0033-3123.

      Volum 80.

      Hefte 4.

      s.1066-1083.

      DOI: 10.1007/s11336-014-9414-0

    • Foldnes, Njål; Foss, Tron; Olsson, Ulf H.

      (2012)

      Residuals and the Residual-Based Statistic for Testing Goodness of Fit of Structural Equation Models.

      Journal of educational and behavioral statistics

      ISSN 1076-9986.

      Volum 37.

      Hefte 3.

      s.367-386.

      DOI: 10.3102/1076998611411920

    • Foldnes, Njål; Olsson, Ulf H.; Foss, Tron

      (2012)

      The effect of kurtosis on the power of two test statistics in covariance structure analysis.

      British Journal of Mathematical & Statistical Psychology

      ISSN 0007-1102.

      Volum 65.

      Hefte 1.

      s.1-18.

      DOI: 10.1111/j.2044-8317.2010.02010.x

    • Dahl, Geir; Foldnes, Njål

      (2006)

      LP based heuristics for the multiple knapsack problem with assignment restrictions.

      Annals of Operations Research

      ISSN 0254-5330.

      Volum 146.

      Hefte 1.

      s.91-104.

    • Dahl, Geir; Foldnes, Njål; Gouveia, Luis

      (2004)

      A note on hop-constrained walk polytopes.

      Operations Research Letters

      ISSN 0167-6377.

      Volum 32.

      s.345-349.

    • Dahl, Geir; Foldnes, Njål

      (2003)

      Complete description of a class of knapsack polytopes.

      Operations Research Letters

      ISSN 0167-6377.

      Volum 31.

      s.335-340.

  • Bøker og kapitler
    • Foldnes, Njål; Grønneberg, Steffen; Hermansen, Gudmund Horn

      (2018)

      Statistikk og Dataanalyse.

      Cappelen Damm Akademisk

      ISBN 9788202512682.

  • Formidling
    • Foldnes, Njål; Vogt, Kaja

      (2021)

      Gaming i norsken.

    • Foldnes, Njål; Svendsen, Paal

      (2021)

      Elever skal game for å avdekke lese- og skrivevansker.

    • Saplacan, Diana; Foldnes, Njål; Aune, Erlend; Dahl, Ida; Voigt, Jakob Michael; Goodwin, Morten

      (2021)

      AI & pedagogics.

    • Foldnes, Njål

      (2020)

      NRK rogaland om GAMEPLAY .

    • Foldnes, Njål; Foldnes, Njål

      (2020)

      Forskere vil bruke maskinlæring for å avdekke skrivevansker.

    • Thomson, Jenny; Foldnes, Njål; Lundetræ, Kjersti; Solheim, Oddny Judith; Njå, Morten Bergsten; Uppstad, Per Henning

      (2019)

      Can childrens instructional gameplay Activity be used as a diagnostic indicator of Reading difficulties?.

    • Walgermo, Bente R.; Foldnes, Njål; Uppstad, Per Henning; Solheim, Oddny Judith

      (2018)

      First Grade Reading Skill and Motivation Dynamics.

    • Wagner, Åse Kari H.; Foldnes, Njål; Lundetræ, Kjersti; Solheim, Oddny Judith; Uppstad, Per Henning

      (2017)

      På sporet - effekt av tidlig innsats for andrespråkselever med risiko for å utvikle lese- og skrivevansker.

    • Strand, Olaug; Wagner, Åse Kari H.; Foldnes, Njål

      (2017)

      Flerspråklige elevers leseresultater i PIRLS 2016.

    • McTigue, Erin ; Solheim, Oddny Judith; Walgermo, Bente R.; Foldnes, Njål; Frijters, Jan c

      (2017)

      Measuring multiple dimensions of early literacy motivation through self-report at school entry.

    • Uppstad, Per Henning; Foldnes, Njål; Lundetræ, Kjersti; Solheim, Oddny Judith; Wagner, Åse Kari H.

      (2016)

      Effect of early intervention for minority children at-risk for reading difficulties.

    • Foldnes, Njål; Hagtvet, Knut Arne

      (2014)

      The Choice of Product indicators in latent variable interaction models.

    • Foldnes, Njål

      (2010)

      The effect of kurtosis on the power of two test statistics.

    • Foldnes, Njål

      (2008)

      Testing Structural Equation Models: The effect of Kurtosis.

    • Dahl, Geir; Flatberg, Truls; Foldnes, Njål; Gouveia, Luis

      (2006)

      The Jump Formulation for the Hop-Constrained Minimum Spanning Tree Problem.

    • Foldnes, Njål; Mørken, Knut Martin; Vistnes, Arnt Inge

      (2005)

      En ny verden: Datamaskinen, beregninger og realfagsundervisning.

      UNIPED

      ISSN 1500-4538.

      Volum 28.

      Hefte 3.

      s.36-43.

    • Dahl, Geir; Foldnes, Njål

      (2003)

      A randomized algorithm for the multiple knapsack problem with assignment restrictions.

    • Dahl, Geir; Foldnes, Njål

      (2003)

      On hop-constrained walk polytopes.

    • Dahl, Geir; Foldnes, Njål

      (2002)

      Polyhedral Properties of certain 0/1 Knapsack Polytopes.

    • Dahl, Geir; Foldnes, Njål

      (2002)

      Complexity of certain multiple knapsack problems.

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