This is a summary of Professor Laurie Santos's "The Science of Well Being" course from Yale—one of the most popular courses in Yale's history. The course examines psychological research on happiness and provides evidence-based strategies for increasing life satisfaction.
The Happiness Problem
What We Wrongly Think Will Make Us Happy
- Good grades - Students who get better grades than expected aren't significantly happier
- High-paying jobs - After ~$75K/year in the US, additional income doesn't increase emotional well-being
- Material possessions - People in the 1940s (without modern conveniences) reported similar happiness levels to today
- Marriage/relationships - Happiness boost lasts only 1-2 years before returning to baseline
- Perfect body/appearance - Weight loss and cosmetic surgery often lead to increased depression
We experience "miswanting"—being mistaken about what and how much we'll like things in the future. Our minds deliver incorrect predictions about happiness with the same confidence as correct ones.
Mind Traps
Hedonic Adaptation
We quickly get used to positive changes, causing initial happiness boosts to fade. Lottery winners report similar happiness to controls after one year. Marriage satisfaction returns to baseline after 2 years.
Social Comparison
We judge our circumstances relative to others, not in absolute terms. Facebook use shows twice the negative correlation with self-esteem as the positive correlation between income and happiness.
Impact Bias
We overestimate both intensity and duration of future emotions. Even HIV diagnosis doesn't reduce happiness as much as expected—we underestimate our psychological resilience.
What Actually Makes Us Happy
Signature Strengths
Jobs that utilize 4+ of your top character strengths feel like "callings" rather than just work. Using strengths in new ways daily increases happiness for up to 6 months.
Kindness and Prosocial Behavior
Performing 5 acts of kindness in one day significantly boosts happiness. Spending money on others ($5 or $20) makes people happier than spending on themselves—this effect holds across cultures and income levels.
Social Connection
Very happy people have more close friends, family ties, and romantic relationships. Talking to strangers on public transit increases happiness despite predictions it would be awkward.
Time Affluence
People who prioritize time over money report higher life satisfaction. When primed to think about time (vs. money), people spend more time socializing.
Exercise and Sleep
30 minutes of exercise 3x/week is as effective as antidepressants for major depression. Sleep deprivation (≤5 hours/night) dramatically reduces positive mood. One night of sleep loss impairs immunity, emotional regulation, and cognitive function.
Meditation
Mind wandering occurs 47% of the time and correlates with unhappiness. Meditation reduces activity in the brain's "default mode network" and increases positive emotions.
Gratitude
Writing 5 things you're grateful for weekly increases life satisfaction. Gratitude visits (delivering thank-you letters) boost happiness for up to 3 months.
Strategies to Overcome Biases
Thwarting Hedonic Adaptation
- Buy experiences, not things - Experiences provide lasting memories without adaptation
- Savor positive moments - Consciously appreciate experiences through sharing and absorption
- Practice negative visualization - Imagine life without current blessings to re-appreciate them
- Express gratitude regularly - Counteracts taking things for granted
Resetting Reference Points
- Concretely re-experience - Revisit past circumstances to appreciate current improvements
- Avoid social media - Reduces exposure to unrealistic comparison targets
- Interrupt consumption - Take breaks during positive experiences to reset enjoyment
Implementation Science
The G.I. Joe Fallacy
Knowing what makes you happy isn't enough—you must actively practice new behaviors. Like optical illusions, intellectual understanding doesn't change automatic responses.
WOOP (Wish, Outcome, Obstacle, Plan)
- Wish - Define specific, measurable goal (3-4 words)
- Outcome - Visualize best possible result and how it feels
- Obstacle - Identify internal barriers honestly
- Plan - Create if-then implementation intentions
Key Exercises ("Rewirements")
Daily Practices
- Meditation - 10-20 minutes daily
- Social connection - Initiate conversations with strangers
- Signature strengths - Use your top strengths in new ways each day
Weekly Practices
- Gratitude journaling - List 5 things you're grateful for weekly
- Acts of kindness - Perform 5 acts of kindness in a single day each week
- Savoring walk - Take a 20-minute walk noticing and appreciating surroundings
- Exercise - 30 minutes of physical activity 3x per week
- Sleep hygiene - Maintain 7-8 hours nightly with consistent schedule
The course's core message: happiness comes not from achieving conventional goals but from intentionally cultivating practices that align with how our minds actually work. Success requires moving beyond knowledge to consistent action.
Appendix: Character Strengths
The course references Martin Seligman's research on character strengths from his book Authentic Happiness. Seligman identified 24 character strengths that are universally valued across cultures and lead to flourishing when practiced.
The 24 Character Strengths
Wisdom & Knowledge
- Creativity, Curiosity, Open-mindedness, Love of learning, Perspective
Courage
- Bravery, Persistence, Integrity, Vitality
Humanity
- Love, Kindness, Social intelligence
Justice
- Teamwork, Fairness, Leadership
Temperance
- Forgiveness, Humility, Prudence, Self-regulation
Transcendence
- Appreciation of beauty, Gratitude, Hope, Humor, Spirituality
Why Signature Strengths Matter
Research shows that using 4+ of your top character strengths at work transforms a "job" into a "calling." Using your signature strengths in new ways daily increases happiness for up to 6 months.
Take the Assessment
The VIA Character Strengths Survey is free and takes about 15 minutes:
Authentic Happiness Test Center (University of Pennsylvania)