Fig. 2

Diagram of the collection, preparation, and testing of the human scent samples. The symbol SS denotes a starting scent represented by one fraction, TS denotes a “full” target scent sample (see text above), and AT denotes a scent sample used for an “attractivity test” (see text). In the diagram, volunteer* denotes one of the 11 volunteers whose scent samples were fractioned. The designation volunteers** refers to the group of 20 other volunteers who provided their scent samples. These samples were used as the distracting scents (DSs)