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. 2019 Jul 12;8(7):253. doi: 10.3390/foods8070253

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Results of (A) principal component analysis (PCA) and (B) correlation matrix of the FaceReader™ (FR) outputs and fixations from eye tracking against the area of interests (AOIs) of familiar packaging concepts. Red/square: AOI, green vector: fixations from eye tracking, blue vector: FR outputs. The x-axis represents the principal component 1 (PC1), and the y-axis represents the principal component 2 (PC2) in the PCA. Abbreviations: AOI, area of interest; Manu info, manufacturer’s information; and Nut info, nutritional information.