Psychological thrillers have evolved significantly from 1910 to present day. Early films from 1910-1940s used techniques like low lighting and camera angles to build tension without sound. From 1950s-1980s, films added elements like music, flashbacks, and quick edits to intensify fear and the psychological experience. Modern films from 1990s-present utilize advanced cameras, sound, and color to create highly intense and realistic psychological thrillers. Over the past century, the genre has increasingly focused on the psychological aspects and mind of characters to disturb and immerse audiences.