Effects of self‐affirmation on emotion and cardiovascular responses

Self-affirmation is the act of focusing on important aspects of the self, such as personal values and characteristics. We used a within-participants design (N = 125) to examine cardiovascular reactivity and self-reported affective responses to the practice of self-affirmation. In the self-affirmation condition, we asked participants to write about their top-ranked personal value for 5 min and used a writing exercise unrelated to personal values in the control condition. The International Affective Picture System was used to induce positive and negative emotion. Results showed that participants had greater high frequency heart rate variability and respiratory sinus arrhythmia (RSA) when practicing self-affirmation. During negative emotion induction, self-affirmation also led to lower maximum heart rate, higher RSA, and lower ratings of negative affect. Our findings suggest that the act of focusing on an important aspect of self has beneficial effects on psychological and physiological well-being.