Browsing NTNU Open by Author "Muff, Stefanie"
Now showing items 1-20 of 25
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A situation-specific solution to Freedman's paradox
Mellbye, Tinius Petter (Bachelor thesis, 2021)Noen forskningsprosjekter baserer seg i stor grad på p-verdier for variabelvalg og rapportering av styrken på variablers relasjon til responsvariabelen. Det er vist at denne måten å utføre forklarende modellering fører til ... -
Accounting for GPS Error in Animal Movement Studies
Panchaud, Clara (Master thesis, 2021)Animal movement studies aim to understand animal behavior by analyzing data consisting of locations visited by the animals, often collected by GPS collars. As the positioning technologies have been improving quickly over ... -
Accounting for individual-specific variation in habitat-selection studies: Efficient estimation of mixed-effects models using Bayesian or frequentist computation
Muff, Stefanie; Signer, Johannes; Fieberg, John (Journal article; Peer reviewed, 2019)1. Popular frameworks for studying habitat selection include resource‐selection functions (RSFs) and step‐selection functions (SSFs), estimated using logistic and conditional logistic regression, respectively. Both frameworks ... -
Accounting for unobserved spatial variation in step selection analyses of animal movement via spatial random effects
Arce Guillen, Rafael; Lindgren, Finn Kristian; Muff, Stefanie; Glass, Thomas W.; Breed, Greg A.; Schlägel, Ulrike E. (Peer reviewed; Journal article, 2023)Step selection analysis (SSA) is a common framework for understanding animal movement and resource selection using telemetry data. Such data are, however, inherently autocorrelated in space, a complication that could impact ... -
Animal models with group-specific additive genetic variances: extending genetic group models
Muff, Stefanie; Niskanen, Alina Katariina; Saatoglu, Dilan; Keller, Lukas; Jensen, Henrik (Journal article; Peer reviewed, 2019)Background The animal model is a key tool in quantitative genetics and has been used extensively to estimate fundamental parameters, such as additive genetic variance or heritability. An implicit assumption of animal ... -
Bias away from the Null due to miscounted outcomes? A case study on the TORCH trial
Muff, Stefanie; Puhan, Milo A.; Held, Leonhard (Journal article; Peer reviewed, 2018)Count outcomes occur in virtually all disciplines, such as medicine, epidemiology or biology, but they often contain error. Recently, it has been shown that self-reported numbers of exacerbations of Chronic Obstructive ... -
Effect of Briefing on Acupuncture Treatment Outcome Expectations, Pain, and Adverse Side Effects among Patients with Chronic Low Back Pain: A Randomized Clinical Trial
Barth, Jürgen; Muff, Stefanie; Kern, Alexandra; Zieger, Anja; Keiser, Stefanie; Zoller, Marco; Rosemann, Thomas; Brinkhaus, Benno; Held, Leonhard; Witt, Claudia M. (Peer reviewed; Journal article, 2021)Importance: In observational studies, patients’ treatment outcome expectations have been associated with better outcomes (ie, a placebo response), whereas concerns about adverse side effects have been associated with an ... -
Effectiveness of hypnosis in third molar extraction: A randomized controlled trial (HypMol)
Egli, Mathias; Deforth, Manja; Keiser, Stefanie; Meyenberger, Patrick; Muff, Stefanie; Witt, Claudia M.; Barth, Jürgen (Journal article; Peer reviewed, 2022) -
Endotype-Phenotype Patterns in Meniere’s Disease Based on Gadolinium-Enhanced MRI of the Vestibular Aqueduct
Bächinger, D.; Brühlmann, C.; Honegger, T.; Michalopoulou, E.; Monge Naldi, A.; Wettstein, V.G.; Muff, Stefanie; Schuknecht, B.; Eckhard, A.H. (Journal article; Peer reviewed, 2019)Two histopathological subtypes of Meniere's disease (MD) were recently described in a human post-mortem pathology study. The first subtype demonstrated a degenerating distal endolymphatic sac (ES) in the affected inner ear ... -
Extending quantitative genetic models to estimate mutational variance
Rekkebo, Vebjørn (Master thesis, 2021)Dette prosjektet introduserer utvidelser av dyremodellen, en type generalisert lineær blandet modell innen kvantitativ genetikk. Modellen utnytter informasjonen i en kjent slektskapsstruktur for dyre- eller plantepopulasjoner ... -
Genetic Group Animal Models in the Genomics Era
Aase, Kenneth (Master thesis, 2021)Denne masteroppgaven tar for seg bruk av dyremodeller med genetiske grupper i studier der vi ser på villdyr-populasjoner. Dyremodellen er en generalisert lineær blandet modell som lar oss undersøke genetiske parametere i ... -
Genomic estimation of quantitative genetic parameters in wild admixed populations
Aase, Kenneth; Jensen, Henrik; Muff, Stefanie (Peer reviewed; Journal article, 2022)1. Heritable genetic variation among free-living animals or plants is essential for populations to respond to selection and adapt. It is therefore important to be able to estimate additive genetic variance VA, which can ... -
Heritability, selection, and the response to selection in the presence of phenotypic measurement error: effects, cures, and the role of repeated measurements.
Ponzi, Erica; Keller, Lukas F.; Bonnet, Timothee; Muff, Stefanie (Journal article; Peer reviewed, 2018)Quantitative genetic analyses require extensive measurements of phenotypic traits, a task that is often not trivial, especially in wild populations. On top of instrumental measurement error, some traits may undergo transient ... -
Immigration counter-acts local micro-evolution of a major fitness component: migration-selection balance in free-living song sparrows
Reid, Jane Margaret; Arcese, Peter; Nietlisbach, Pirmin; Wolak, Matthew; Muff, Stefanie; Dickel, Lisa; Keller, Lukas F. (Peer reviewed; Journal article, 2021)Ongoing adaptive evolution, and resulting “evolutionary rescue” of declining populations, requires additive genetic variation in fitness. Such variation can be increased by gene flow resulting from immigration, potentially ... -
Inbreeding reduces long-term growth of Alpine ibex populations
Bozzuto, Claudio; Biebach, Iris; Muff, Stefanie; Ives, Anothony R.; Keller, Lukas F. (Journal article; Peer reviewed, 2019)Many studies document negative inbreeding effects on individuals, and conservation efforts to preserve rare species routinely employ strategies to reduce inbreeding. Despite this, there are few clear examples in nature of ... -
A joint Bayesian framework for missing data and measurement error using integrated nested Laplace approximations
Skarstein, Emma Sofie; Martino, Sara; Muff, Stefanie (Peer reviewed; Journal article, 2023)Measurement error (ME) and missing values in covariates are often unavoidable in disciplines that deal with data, and both problems have separately received considerable attention during the past decades. However, while ... -
Modeling non-Gaussian traits using Gaussian quantitative genetic models
Nilsen, Frederick (Master thesis, 2023)Innenfor kvantitativ genetikk har dyremodellen blitt mye brukt til å modellere fenotypiske egenskaper, med både faste og tilfeldige effekter. Ved modellering av binære egenskaper brukes ofte en generell lineær blandet ... -
Neural networks for genomic prediction
Singsaas, Øyvind Hansen (Master thesis, 2024)Denne masteroppgaven utforsker bruken av nevrale nettverk for genomisk prediksjon på enkeltnukleotidpolymorfismer (SNP-er) fra en vill populasjon av gråspurv. Til tross for suksessen til nevrale nettverk, har de ennå ikke ... -
Relative Variable Importance Approaches for Linear Models with Random Intercepts
Matre, Andreas (Master thesis, 2022)Å tolke lineære regresjonsmodeller er et vanlig ønske innen forskning. Et vanlig spørsmål forskere er interessert i er hvor viktig en prediktor er for modellen. Å vite den individuelle betydningen av hver prediktor kan ... -
Relative variable importance in Bayesian generalized linear mixed models with applications in quantitative genetics
Arnstad, August (Master thesis, 2024)Som en av de mest brukte statistiske metodene, har regresjonsmodeller en fundamental posisjon i statistikk. En nøkkeldel av regresjonsanalysen er å skaffe inferens om kovariatene som brukes til å modellere responsvariabelen, ...