Eine neue Studie liefert Hinweise darauf, dass Koffein, wie lange Menschen bei der Versuch, schwierige oder unlösbare Aufgaben zu erledigen, erhöhen kann. Die Ergebnisse legen nahe, dass Koffein einen aktiveren Bewältigungsstil beim Menschen fördern kann.

I’ve linked to the news release in the post above. In this comment, for those interested, here’s the link to the peer reviewed journal article:

https://onlinelibrary.wiley.com/doi/10.1002/hup.70014

From the linked article:

**A new study provides evidence that caffeine can increase how long people persist in trying to complete difficult or unsolvable tasks, and this effect is especially pronounced in people who have recently experienced stress. The findings, published in Human Psychopharmacology: Clinical and Experimental, suggest that caffeine may promote a more active coping style in humans**, in line with earlier behavioral findings from rodent research.

Or it gives you anxiety and you can’t do anything. It’s interesting how we respond to different things, like a serotonin increase or dopamine increase, everyone responds differently.