The three highest-values for each pair of attributes and the total interactions alike are marked in bold characters. It can be observed that the attribute residues is consistently interacting with other attributes, appearing amongst the highest ranked attributes for total interactions in both cases (4.00 for Sample 1 and 4.02 for Sample 2). This attribute also has one of the highest values of mutual interactions, namely with "ease of absorption" (1.46) and "freshness" (0.98) for sample 1, and with "thickness" (0.69), "stickiness" (0.97) and "moisturization" (-0.85) for sample 2. The positive or negative sign means that the effect is synergistic or antagonist.67
Normalized composite indices were calculated as a product of previous normalized indices, as it is shown in Table 6. Here, "ease of absorption" (0.29) and "residues" (0.34) are the most important attributes under this metric, in the case of Sample 1 and Sample 2, respectively. "Residues" and "freshness" have consistently one of the highest composite indices (0.20 and 0.25, for sample 1 and 0.34 and 0.14 for sample 2, respectively). In the next section, it is shown how these indices can be used to guide the selection of alternatives, based on the specific profile of each sample product.