US and CSs
Plastic teaspoons with approximately 2 g of chocolate mousse (Almhof) were used as USs. A round green vase with three artificial red roses and a rectangular orange vase with three artificial white daisies were used as CSs. One of these vases served as CS+ and the other as CS−, and this was counterbalanced across participants. Four CS+ and four CS− trials were presented to each participant. The order of the trial presentation was random, with the restriction that the first two trials always consisted of one CS+ and one CS−, counterbalanced across participants. Furthermore, there were no more than two consecutive trials of the same type (CS+ or CS−).