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Directed Sorting Using Trained Assessors for Categorization of Honeybush Tea: Comparison of Correspondence Analysis and DISTATIS Combined With Barycentric Text Projection

The validity of sorting as rapid method for sensory characterization of food has been demonstrated, however, research on its effectiveness to profile complex products, especially when using trained assessors, is… Click to show full abstract

The validity of sorting as rapid method for sensory characterization of food has been demonstrated, however, research on its effectiveness to profile complex products, especially when using trained assessors, is limited. In this study, directed sorting based on aroma (sortingAROMA), palate (sortingPALATE) and both aroma and palate attributes (sortingGLOBAL) were conducted by trained assessors to categorize honeybush tea prepared from five Cyclopia species. Descriptive sensory analysis provided a detailed sensory profile of the same samples for comparison. SortingAROMA and sortingPALATE resulted in similar sample configurations. SortingGLOBAL was less effective at grouping samples per species. Despite the use of trained assessors, three replicate sessions were needed to ensure consistent results, particularly for sortingAROMA. Both DISTATIS, combined with Barycentric Text Projection (BTP), and Correspondence Analysis (CA) produced similar correspondences between attributes and sample groupings. The bootstrap ratios of DISTATIS‐BTP confirmed significant sample‐attribute associations, thereby providing additional information.

Keywords: honeybush tea; analysis; using trained; distatis combined; directed sorting; trained assessors

Journal Title: Journal of Sensory Studies
Year Published: 2024

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