With her co-authors William T. L. Cox, Patricia Devine, and Steven D. Hollon, she proposed the integrated perspective on prejudice and depression, which combines cognitive theories of depression with cognitive theories of prejudice. Lyn and her coauthors propose that many cases of depression may be caused by prejudice from the self or from another person. "This depression caused by prejudice – which the researchers call deprejudice — can occur at many levels. In the classic case, prejudice causes depression at the societal level (e.g., Nazis’ prejudice causing Jews’ depression), but this causal chain can also occur at the interpersonal level (e.g., an abuser's prejudice causing an abusee's depression), or even at the intrapersonal level, within a single person (e.g., a man's prejudice against himself causing his depression)."