Which of the following traits has been of particular interest to Eysenck?

A) Intelligence.
B) Autonomic reactivity.
C) Conscientiousness.
D) Extraversion-introversion.

Eysenck

A psychologist known for his work in the fields of personality, behavior genetics, and the biological basis of intelligence.

Extraversion-Introversion

A personality dimension that characterizes individuals on a continuum from outgoing and energy-gathering from external sources (extraversion) to quiet and energy-gathering from internal sources (introversion).

Autonomic Reactivity

The degree to which the autonomic nervous system responds to stress or emotional stimuli, affecting heart rate, breathing, and other involuntary functions.