What is the author's style in The Portrait of a Lady by Henry James?

James is considered the foremost author of psychological realism, a subcategory of American realism.

The Realist period in American literature followed Romanticism, a movement that produced stories of idealized love and that elevated emotion above reason. The harsh realities of the Civil War suddenly made Romanticism irrelevant. The year of the war's end, 1865, marks the end of the Romantic period and the beginning of American realism.