The analysis of the large epidemiological data by Goodwin (2003), which showed that as levels of physical activity increased the likelihood of experiencing depressive disorders decreased, reflected a dose-response relationship.

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Goodwin's analysis demonstrated a dose-response relationship because it showed that with increasing levels of physical activity, the likelihood of experiencing depressive disorders decreased, indicating that more of the "dose" (physical activity) led to a greater protective effect against depression.

The Analysis of the Large Epidemiological Data by Goodwin (2003)