Final answer:
Individuals with both Psychopathic Deviate and Psychasthenia share the trait of chronic fear and excessive worrying, despite their distinct manifestations of the disorders.
Step-by-step explanation:
The trait that is commonly shared by individuals with both Psychopathic Deviate and Psychasthenia is chronic fear and excessive worrying. While psychopathy is often associated with a lack of empathy and disregard for others' rights, psychasthenia is characterized by excessive doubts, compulsions, obsessions, and irrational fears. What connects these two seemingly distinct disorders is an underlying sense of anxiety and fear, which can manifest in worrisome behavior, though manifested differently in each disorder.