there isn't any scientific research or evidence to suggest that narcissists' pupils specifically dilate fully when they are mad or angry. Pupil dilation is a complex physiological response influenced by various factors, including changes in lighting conditions, emotional arousal, cognitive processing, and even drug use.
Pupils can dilate for various reasons, such as low lighting conditions, arousal or excitement, fear, surprise, and certain drug effects. When a person experiences strong emotions like anger or fear, their sympathetic nervous system can become activated, leading to an increase in heart rate, blood pressure, and pupil dilation. However, this is not unique to narcissists; it can happen to anyone experiencing intense emotions.
It's essential to avoid making generalizations about specific behaviors related to psychological traits like narcissism. While narcissists may exhibit certain behavioral patterns, attributing unique or universal physiological responses like pupil dilation to them requires robust scientific evidence, which is currently lacking.
As always, it's best to rely on evidence-based research and avoid making assumptions based on stereotypes or anecdotal observations. If you're interested in understanding specific behaviors associated with narcissism or any other psychological condition, consider consulting with a qualified mental health professional or referring to reputable scientific literature.