*3.5. Tasting Phase: RPPG and PPG Heart Rate*

*RPPG heart rate*. RPPG heart rates during tasting lowered from 60.2 to 57.8 BPM with branding information (F(1,1074) = 44.5, *p* < 0.001). This decrease was especially large for inexperienced participants (interaction: F(1,1074) = 7.6, *p* < 0.001). RPPG heart rates of experienced participants were highest for Kikkoman, whereas those for inexperienced participants were highest for Formula 1 (interaction: F(2,1073) = 13.7, *p* < 0.001).

*PPG heart rate*. PPG heart rates during tasting were 12–14 BPM higher than RPPG heart rates, but also showed a lowered PPG heart rate (from 74.6 to 71.9 BPM) with branding information (F(1,954) = 116.2, *p* < 0.001). PPG heart rates varied with soy sauce (F(2,954) = 5.2, *p* < 0.001). PPG heart rates increased during chewing from 71.6 to 74.6 BPM (F(4,954) = 17.2, *p* < 0.001). This increase was especially large for inexperienced participants (F(4,954) = 2.8, *p* = 0.02). Results are shown in Figure 3.
