Because SNS activity is predominant in stressful situations, SCLR (i.e., changes in SCL baseline to a stressor) is a particularly useful indicator for the ANS activity elicited by stress (Boucsein, 2012). Remarkably, recent research strongly supports the necessity to conceptualize SCLR as a stable individual variable of children across different stressors rather than only a stimulus-evoked physiological response (El-Sheikh, 2007).