Thomas Holmes and Richard Rahe , a pair of psychiatrists, developed the Social Readjustment Rating Scale (SRRS) in 1967.

Origin Story

The SRRS emerged from research at the University of Washington, where Holmes and Rahe sought to quantify how life events—like marriage or job loss—trigger stress through required adjustments. They surveyed over 400 people to assign "life change units" (LCUs) to 43 events, with marriage at 500 LCUs as the benchmark, revolutionizing stress measurement by standardizing subjective experiences.

Key Impact

This scale demonstrated that cumulative LCUs over 300 in a year correlate with higher illness risk, influencing modern psychology tools. Updates, like a 2023 revision, kept original weights compatible while modernizing items (e.g., updating "mortgage over $10,000").

Why Psychiatrists?

Holmes, a psychiatrist, and Rahe, a medical researcher often linked to psychiatry in contexts, focused on psychosomatic links between stress and health, though Rahe was primarily in internal medicine.

TL;DR: Holmes and Rahe created the SRRS.

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