Study of induced emotion by color stimuli: Power spectrum analysis of heart rate variability

The current study analyzed heart rate variability in the frequency domain to study the effect of different colors on the autonomic nervous system and emotions induced by different colors. Sixteen female volunteers were presented with four different colors on a digital screen as a visual stimulus while the lead II of ECG was recorded. For assessment of induced emotion by colors, validated Self-Assessment Manikin Test were used. Effects of colors on power spectrum of HRV were reported. The results showed that red and yellow increased power in high frequency (p<1E−4). Also, the value of low frequency power in response to yellow and green were less than control state.