Blar i NOFIMA vitenarkiv på forfatter "Næs, Tormod"
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A comparison of generalised procrustes analysis and multiple factor analysis for projective mapping data
Tomic, Oliver; Berget, Ingunn; Næs, Tormod (Peer reviewed; Journal article, 2015)Generalised procrustes analysis and multiple factor analysis are multivariate statistical methods that belong to the family of multiblock methods. Both methods are often used for analysis of data from projective mapping ... -
A comparison of methods for analyzing multivariate sensory data in designed experiments - A case study of salt reduction in liver paste
Næs, Tormod; Tomic, Oliver; Greiff, Kirsti; Thyholt, Kari (Peer reviewed; Journal article, 2014)This paper presents a comparison of different methods for analyzing designed experiments. The methods used are based on PCA, PLS and ANOVA, used either separately or in combination. Special emphasis will be on how to obtain ... -
A comparison of two new take-away strategies and their relation to rating and ranking of extrinsic properties of dry cured ham
Næs, Tormod; Monteleone, Erminio; Segtnan, Anne; Hersleth, Margrethe (Peer reviewed; Journal article, 2013)This paper is a study of the relationship between rating, ranking and take-away choices of dry cured ham. Extrinsic attributes related to country of origin, ageing time and price are considered and we study average population ... -
A discussion of recent methodologies for combining sensory and extrinsic product properties in consumer studies
Asioli, Daniele; Varela, Paula; Hersleth, Margrethe; Almli, Valerie Lengard; Olsen, Nina Veflen; Næs, Tormod (Journal article, 2016)Understanding the interaction of sensory and extrinsic product attributes in consumer preferences has been identified as one of the key pillars for raising the likelihood of food products’ success in the market. Over the ... -
A quantile regression perspective on external preference mapping
Davino, Cristina; Næs, Tormod; Romano, Rosaria; Vistocco, Domenico (Peer reviewed; Journal article, 2022) -
A similarity index for comparing coupled matrices
Indahl, Ulf Geir; Næs, Tormod; Liland, Kristian Hovde (Journal article; Peer reviewed, 2018) -
An assessment of voltammetry on disposable screen printed electrodes to predict wine chemical composition and oxygen consumption rates
Ferreira, Chelo; Sáenz-Navajas, Maria-Pilar; Carrascón, Vanesa; Næs, Tormod; Fernández-Zurban, Purificación; Ferreira, Vicente (Peer reviewed; Journal article, 2021)The present work aimed at determining the applicability of linear sweep voltammetry coupled to disposable carbon paste electrodes to predict chemical composition and wine oxygen consumption rates (OCR) by PLS-modeling of ... -
An assessment of voltammetry on disposable screen printed electrodes to predict wine chemical composition and oxygen consumption rates
Ferreira, Chelo; Sáenz-Navajas, Maria-Pilar; Carrascón, Vanesa; Næs, Tormod; Fernández-Zurbano, Purificación; Ferreira, Vicente (Peer reviewed; Journal article, 2022)The present work aimed at determining the applicability of linear sweep voltammetry coupled to disposable carbon paste electrodes to predict chemical composition and wine oxygen consumption rates (OCR) by PLS-modeling of ... -
Application of sequential and orthogonalised-partial least squares (SO-PLS) regression to predict sensory properties of Cabernet Sauvignon wines from grape chemical composition
Niimi, Jun; Tomic, Oliver; Næs, Tormod; Jeffery, David; Bastian, Susan E.P.; Boss, Paul K. (Journal article; Peer reviewed, 2018) -
Cage of covariance in calibration modeling: Regressing multiple and strongly correlated response variables onto a low rank subspace of explanatory variables
Eskildsen, Carl Emil Aae; Næs, Tormod; Skou, P.B.; Solberg, Lars Erik; Dankel, Elin Katinka; Basmoen, Silje A.; Wold, Jens Petter; Horn, Siri S.; Hillestad, B.; Poulsen, Nina A.; Christensen, Mette; Pieper, Theo; Afseth, Nils Kristian; Engelsen, Søren B. (Peer reviewed; Journal article, 2021)In analytical chemistry, multivariate calibration is applied when substituting a time-consuming reference measurement (based on e.g. chromatography) with a high-throughput measurement (based on e.g. vibrational spectroscopy). ... -
Children’s sweet tooth: Explicit ratings vs. Implicit bias measured by the Approach avoidance task (AAT)
Galler, Martina; Mikkelsen, Emma; Næs, Tormod; Liland, Kristian Hovde; Ares, Gastón; Varela, Paula (Peer reviewed; Journal article, 2021)The study aimed to assess the application of the Approach avoidance task (AAT) with children to measure implicit motivational tendencies towards foods differing in sweetness and calorie content and to explore the relationship ... -
Clustering consumers based on product discrimination in check-all-that-apply (CATA) data
Castura, J.C; Meyners, M.; Varela, Paula; Næs, Tormod (Peer reviewed; Journal article, 2022)Consumers can be clustered based on their product-related check-all-that-apply (CATA) responses. We identify two paradoxes that can occur if these clusters are derived from conventional similarity coefficients. The first ... -
Combining analysis of variance and three-way factor analysis methods for studying additive and multiplicative effects in sensory panel data
Romano, Rosaria; Næs, Tormod; Brockhoff, Per Bruun (Peer reviewed; Journal article, 2015)Data from descriptive sensory analysis are essentially three-way data with assessors, samples and attributes as the three ways in the data set. Because of this, there are several ways that the data can be analysed. The ... -
Combining analysis of variance and three-way factor analysis methods for studying additive and multiplicative effects in sensory panel data
Romano, Rosaria; Næs, Tormod; Brockhoff, Per Bruun (Peer reviewed; Journal article, 2015)Data from descriptive sensory analysis are essentially three-way data with assessors, samples and attributes as the three ways in the data set. Because of this, there are several ways that the data can be analysed. The ... -
Common and distinct components in data fusion
Smilde, Age K.; Måge, Ingrid; Næs, Tormod; Hankemeier, Thomas; Lips, Miriam B.; Kiers, Henk A. L.; Acar, Evrim; Bro, Rasmus (Journal article; Peer reviewed, 2017)In many areas of science, multiple sets of data are collected pertaining to the same system. Examples are food products that are characterized by different sets of variables, bioprocesses that are online sampled with ... -
Comparison of different clustering methods for investigating individual differences using choice experiments
Asioli, Daniele; Berget, Ingunn; Næs, Tormod (Journal article; Peer reviewed, 2018) -
Comparison of Different Ways of Handling L-shaped Data for Integrating Sensory and Consumer Information
Asioli, Daniele; Nguyen, Quoc Cuong; Varela, Paula; Næs, Tormod (Peer reviewed; Journal article, 2021)Different approaches for handling L-shaped data are compared for the first time in a study conducted with Norwegian consumers. Consumers (n = 101) valuated eight different yoghurt profiles varying in three intrinsic ... -
Comparison of pivot profile© to frequency of attribute citation: Analysis of complex products with trained assessors
Brand, Jeanne; Valentin, Dominique; Kidd, Martin; Vivier, Melane A.; Næs, Tormod; Nieuwoudt, Helene H. (Peer reviewed; Journal article, 2020)Pivot© profile (PP), a method which compares samples to a reference (pivot), has shown profiling potential for complex matrices. However, various aspects require further investigation. This study’s aim was to compare PP ... -
Confidence ellipsoids for ASCA models based on multivariate regression theory
Liland, Kristian Hovde; Smilde, Age K.; Marini, Federico; Næs, Tormod (Journal article; Peer reviewed, 2018) -
Critical evaluation of assessor difference correction approaches in sensory analysis
Großmann, Justus L.; Westerhuis, Johan A.; Næs, Tormod; Smilde, Age K. (Others, 2022)In sensory data analysis, assessor-dependent scaling effects may hinder the analysis of product differences. Romano et al. (2008) compared several approaches to reduce scaling differences between assessors by their ability ...