Final answer:
According to the Eysencks' theory, neuroticism is a personality trait characterized by anxiety, emotional instability, and an overactive sympathetic nervous system. People high on neuroticism tend to be easily rattled, while those low on neuroticism are emotionally stable and calm.
Step-by-step explanation:
According to the Eysencks' theory of personality, people high on neuroticism tend to be anxious, easily rattled, and emotionally unstable. They have an overactive sympathetic nervous system, which triggers a flight-or-fight reaction even in low-stress situations. In contrast, people low on neuroticism are calm, stable, and emotionally resilient.
Neuroticism is one of the Big Five personality traits, which also include openness, conscientiousness, extraversion, and agreeableness. People high on neuroticism may experience negative emotions more frequently, such as anger, impulsiveness, and hostility, while those low on neuroticism tend to be even-tempered and less prone to emotional instability.