How did Oskar Kokoschka portray psychological character in his early portraits?

In his early portraits, Oskar Kokoschka portrayed psychological character through a highly sensitive and focused approach to his subjects. To convey the internal psychological states of his sitters, he utilized delicate, agitated lines to describe their figures while employing relatively naturalistic colors.1

Furthermore, he intentionally exaggerated specific features and gestures of the individuals he painted to externalize their inner emotions and character. This preoccupation with the subject's psyche, combined with an increasing emphasis on expressing character through color, became a hallmark of his early portraiture, as seen in his works depicting figures such as Hans Tietze, Erica Tietze-Conrat, and Peter Altenberg.1