Effort Production in Major Depression
Author Information
Author(s): Cléry-Melin Marie-Laure, Schmidt Liane, Lafargue Gilles, Baup Nicolas, Fossati Philippe, Pessiglione Mathias
Primary Institution: Institut du Cerveau et de la Moelle épinière (ICM), Hôpital de la Pitié-Salpêtrière, Paris, France
Hypothesis
Depressed patients would not increase their effort for higher incentives but would remain sensitive to emotional manipulation.
Conclusion
The study found that depressed patients have a specific deficit in incentive motivation, making it difficult for them to exert effort for larger rewards.
Supporting Evidence
- Depressed patients exerted more effort following emotionally arousing pictures but not for higher monetary incentives.
- Patients' ratings of perceived effort increased for high incentives, while controls' ratings decreased.
- Emotional arousal enhanced force production in depressed patients.
Takeaway
People with depression find it hard to work for rewards, even if they feel like they are trying hard.
Methodology
The study used a behavioral paradigm to measure physical effort in response to emotional modulation and monetary incentives.
Limitations
The study's measures of incentive motivation effects were not sensitive enough to discriminate major depression at the individual level.
Participant Demographics
22 depressed patients (average age 43.3 years, 5 males) and 26 healthy controls (average age 44.8 years, 9 males).
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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