How to Make Better Decisions | Dr. Michael Platt
Dr. Michael Platt, a professor at the University of Pennsylvania, dives deep into the fascinating influences of hormones and social dynamics on decision-making. He reveals how our values can shift based on power structures and hormonal levels, affecting everything from attraction to political beliefs. Platt compares human behaviors to those of primates, exploring evolutionary roots. Insightfully, he discusses tools to enhance focus and creativity, emphasizing the significant role of attention in our daily lives and relationships.
Top snips
There's a little monkey in all of us
3:40 – 7:26
We are old-world primates: humans and macaques share the same decision, attention, and social circuits. Platt calls the brain a 30-million-year-old Swiss Army knife — many specialized tools, not a single supercomputer.
This explains why monkeys and people behave strikingly similarly in lab and real-world choices.
I always like to say there's a little monkey in all of us.
— Michael Platt
Attention = Foraging for information
12:21 – 23:20
Attention works like foraging: you stay with a source until its returns fall below the environment's average (Marginal Value Theorem).
Consequences:
- Visual stimuli & faces grab attention
- Phones nearby reduce working memory
- Make distractions harder by changing the environment
Put the phone in another room to boost focus.
Warm up your focus — visual aperture trick
28:15 – 37:45
You can train attention by changing visual input. Small, narrow fixation tightens focus; wide, panoramic views relax and broaden thinking.
Practical tools:
- Fixate a dot 1–2 minutes before deep work
- Use horizon views for creativity
- Turn your phone grayscale or remove it entirely
This is behavioral 'pharmacology.'
Monkey porn → how we value mates & status
1:00:42 – 1:36:52
Platt’s classic: monkeys will pay juice to view sexual or high-status images. Humans do the same economically — men paid money, waited, and worked harder to see attractive women in experiments.
Takeaway: social signals (status, sex) hijack reward circuits, influencing choices beyond conscious awareness.
Oxytocin: the synchrony & bonding dial
2:00:02 – 2:05:15
Oxytocin lowers anxiety, increases eye contact and behavioral synchrony — aligning brains, hearts, and actions.
Effects in monkeys:
- Flattens hierarchies
- Boosts prosocial choices
- Females: more protective toward infants
Synchronized teams make better decisions; social touch releases oxytocin — we’re missing that.
Social copying → bubbles, meme coins & markets
3:06:40 – 3:10:45
We learn from others. Platt’s stock‑market studies show social sensitivity predicts being caught in bubbles.
Key mechanisms:
- You watch others’ portfolios
- Attention to who’s winning drives copying
- Celebrity/endorsement reduces doubt (pupil & reward effects)
Result: meme stocks/coins exploit our social valuation wiring.