RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2
After sensory evaluation by a trained panel, and biophysical evaluation using the instrumental measurements of the different products, statistical treatments can be used to interpret the results. The objective of this tutorial, using XLSTAT software, is to perform and interpret 2 types of statistical treatments: (1) principal component analysis (PCA) which enables rapid visualisation of the correlations between the sensory attributes, and (2) linear regression, which allows prediction of the sensory attributes based on the biophysical (textural, biochemical) parameters. The performance of the panel has previously been checked, and the sensory data were prepared for statistical analysis (see RTBfoods_F.2.4A_Tutorial for Performance Monitoring & Sensory Data Cleaning Before Statistical Analysis_2021.pdf). The present tutorial is based on an example presented in a published Excel file that goes through one step after another. The selected PCA uses sensory data to identify major trends and sensory diversity between groups of products and between individual products. The PCA also makes it possible to measure differences between repeated products that reflect the performance of the panel (if the products are indeed identical). Multiple linear regression was used to predict sensory attributes from biophysical parameters. For this purpose, in our example, the dataset was split into two datasets: a calibration set representing ¾ of the data and a validation set containing the remaining data. Three prediction indicators were calculated to assess the accuracy and robustness of the prediction: the coefficient of determination (R²), the mean difference between observed and predicted values (RMSEC) in the calibration set, and the mean difference between the observed and predicted values in the validation set (RMSEV). The relevance of the validation and the minimum number of observations necessary to build predictive models are discussed.
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dig-cirad-fr-6034302023-04-17T16:48:42Z http://agritrop.cirad.fr/603430/ http://agritrop.cirad.fr/603430/ RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2. Bugaud Christophe, Maraval Isabelle, Meghar Karima. 2022. Montpellier : RTBfoods Project-CIRAD, 24 p. https://doi.org/10.18167/agritrop/00710 <https://doi.org/10.18167/agritrop/00710> Researchers RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2 Bugaud, Christophe Maraval, Isabelle Meghar, Karima eng 2022 RTBfoods Project After sensory evaluation by a trained panel, and biophysical evaluation using the instrumental measurements of the different products, statistical treatments can be used to interpret the results. The objective of this tutorial, using XLSTAT software, is to perform and interpret 2 types of statistical treatments: (1) principal component analysis (PCA) which enables rapid visualisation of the correlations between the sensory attributes, and (2) linear regression, which allows prediction of the sensory attributes based on the biophysical (textural, biochemical) parameters. The performance of the panel has previously been checked, and the sensory data were prepared for statistical analysis (see RTBfoods_F.2.4A_Tutorial for Performance Monitoring & Sensory Data Cleaning Before Statistical Analysis_2021.pdf). The present tutorial is based on an example presented in a published Excel file that goes through one step after another. The selected PCA uses sensory data to identify major trends and sensory diversity between groups of products and between individual products. The PCA also makes it possible to measure differences between repeated products that reflect the performance of the panel (if the products are indeed identical). Multiple linear regression was used to predict sensory attributes from biophysical parameters. For this purpose, in our example, the dataset was split into two datasets: a calibration set representing ¾ of the data and a validation set containing the remaining data. Three prediction indicators were calculated to assess the accuracy and robustness of the prediction: the coefficient of determination (R²), the mean difference between observed and predicted values (RMSEC) in the calibration set, and the mean difference between the observed and predicted values in the validation set (RMSEV). The relevance of the validation and the minimum number of observations necessary to build predictive models are discussed. monograph info:eu-repo/semantics/report Report info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/603430/1/RTBfoods_Guidance_Statistical%20Analyses%20to%20Visualise%20Sensory%20Data%20and%20Relate%20it%20to%20Instrumental%20Data.pdf text cc_by_nc_sa info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/4.0/ https://doi.org/10.18167/agritrop/00710 10.18167/agritrop/00710 info:eu-repo/semantics/altIdentifier/doi/10.18167/agritrop/00710 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.18167/agritrop/00710 info:eu-repo/grantAgreement/////(FRA) Breeding RTB Products for End User Preferences/RTBfoods project |
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After sensory evaluation by a trained panel, and biophysical evaluation using the instrumental measurements of the different products, statistical treatments can be used to interpret the results. The objective of this tutorial, using XLSTAT software, is to perform and interpret 2 types of statistical treatments: (1) principal component analysis (PCA) which enables rapid visualisation of the correlations between the sensory attributes, and (2) linear regression, which allows prediction of the sensory attributes based on the biophysical (textural, biochemical) parameters. The performance of the panel has previously been checked, and the sensory data were prepared for statistical analysis (see RTBfoods_F.2.4A_Tutorial for Performance Monitoring & Sensory Data Cleaning Before Statistical Analysis_2021.pdf). The present tutorial is based on an example presented in a published Excel file that goes through one step after another. The selected PCA uses sensory data to identify major trends and sensory diversity between groups of products and between individual products. The PCA also makes it possible to measure differences between repeated products that reflect the performance of the panel (if the products are indeed identical). Multiple linear regression was used to predict sensory attributes from biophysical parameters. For this purpose, in our example, the dataset was split into two datasets: a calibration set representing ¾ of the data and a validation set containing the remaining data. Three prediction indicators were calculated to assess the accuracy and robustness of the prediction: the coefficient of determination (R²), the mean difference between observed and predicted values (RMSEC) in the calibration set, and the mean difference between the observed and predicted values in the validation set (RMSEV). The relevance of the validation and the minimum number of observations necessary to build predictive models are discussed. |
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Bugaud, Christophe Maraval, Isabelle Meghar, Karima |
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Bugaud, Christophe Maraval, Isabelle Meghar, Karima RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2 |
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Bugaud, Christophe Maraval, Isabelle Meghar, Karima |
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Bugaud, Christophe |
title |
RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2 |
title_short |
RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2 |
title_full |
RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2 |
title_fullStr |
RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2 |
title_full_unstemmed |
RTBfoods Manual - Part 3 - Tutorial: Statistical Analyses (PCA and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. Biophysical characterization of quality traits, WP2 |
title_sort |
rtbfoods manual - part 3 - tutorial: statistical analyses (pca and multiple regression) to visualise the sensory analysis data and relate it to the instrumental data. biophysical characterization of quality traits, wp2 |
publisher |
RTBfoods Project |
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http://agritrop.cirad.fr/603430/ http://agritrop.cirad.fr/603430/1/RTBfoods_Guidance_Statistical%20Analyses%20to%20Visualise%20Sensory%20Data%20and%20Relate%20it%20to%20Instrumental%20Data.pdf |
work_keys_str_mv |
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