• Serotonin: Not just a brainy term! It's an inhibitory neurotransmitter (think of it like a brain's 'calm down' signal) that helps keep your mood stable and makes sure you get good sleep.
• Main question: Can a tiny thing like serotonin in our brain affect our 'free will' and make us act nicely (aka prosocially)?

• Aim: To see if serotonin affects our decisions when faced with moral choices.
• Participants: 30 healthy peeps (avg. age: 26).

• 🔄 Design: Repeated measures (same people, different conditions).
• 🌡 Condition 1: Given citalopram, a drug that boosts serotonin.
• 💊 Condition 2: Placebo, the control. Basically, a 'fake' pill.

🤔 Did you know?

• Citalopram is like a bouncer at a club, not letting serotonin leave. It's called a "selective serotonin reuptake inhibitor" or SSRI for short.

• The study was double-blind. This means neither the participants nor the researchers knew who was getting the real drug or the placebo. It's like a secret surprise party for science!

Participants had to decide on some tricky situations after taking the drug

• 🚂 Scenario A (Personal): Would you push a man off a bridge to stop a train from hitting five other people?
• 🚂 Scenario B (Impersonal): Would you press a lever to divert a train from hitting five people, but it ends up hitting one?