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“Dubbed depressive realism, Alloy and Abramson’s work has inspired other, often quite sophisticated, experimental demonstrations of ways that low mood can lead to better, clearer thinking. Compared to subjects in a positive mood, subjects who were put in a negative mood (by watching a ten-minute film about death from cancer) produced more effective persuasive messages on a standardized topic such as raising student fees or aboriginal land rights. Follow-up analyses found that the key reason the sadder people were more persuasive was that their arguments were richer in concrete detail. If people who are in a sad mood sometimes assess the world quite accurately, people in a “normal,â€� healthy mood may be less in touch with reality. At least some data suggest that people in a normal mood can be prone to positive illusions, overconfidence, and blindness to faults.”