Final answer:
The characteristic not exhibited by individuals with antisocial personality disorderis increased autonomic arousal in unnerving situations. Instead, they tend to show a blunted autonomic response to stress, contrary to having characteristics like a hyperactive dopamine system and a smaller amygdala. The correct choice is b. increased autonomic arousal in unnerving situations.
Step-by-step explanation:
The characteristic not found for those with antisocial personality disorder (ASPD) is b. increased autonomic arousal in unnerving situations. People with ASPD tend to have a blunted autonomic response to stress or threatening stimuli, which means they have lower levels of physiological arousal in such scenarios compared to the average population.
Research, such as that conducted by Fung et al. (2005), has shown that individuals prone to characteristics of antisocial or psychopathic behavior often exhibit reduced electrodermal activity, indicative of this decreased arousal. On the contrary, individuals with ASPD do frequently have a hyperactive dopamine reward system, a smaller-than-normal amygdala, and an increased likelihood of ASPD among biological relatives.