Skin conductance responses and their duration during stages of the testing session. a) Skin conductance responses recorded during resting eyes open (REO), continuous performance task (CPT), go/no-go task (GNG), and cued target detection task (CTD). *The number of skin conductance responses during REO were fewer than at all other stages. #CPT responses were fewer than responses made during the GNG and greater than responses made during the CTD. @GNG responses were greater than during the CTD. b) Duration of skin conductance responses. *The duration of responses during REO was shorter than at all other stages. #CPT duration of response was shorter than the duration of responses during the GNG and CTD (p < 0.0125, n = 46, mean ± SEM).