sensitivity

(physiology) responsiveness to external stimuli; the faculty of sensation; "sensitivity to pain"

the ability to respond to physical stimuli or to register small physical amounts or differences; "a galvanometer of extreme sensitivity"; "the sensitiveness of Mimosa leaves does not depend on a change of growth"

sensitivity to emotional feelings (of self and others)

susceptibility to a pathogen

the ability to respond to affective changes in your interpersonal environment