Behavioral science applies findings from psychology and economics to understand how people actually make decisions — not how they say they do. It's the foundation of every high-performing experimentation program.
31 articles
Real cognitive bias examples from 200+ A/B tests: where each one lifts conversion, the lift range, and exactly when it backfires or fails to replicate.
Zhu, Yang, and Hsee documented the Mere Urgency Effect in 2018 — subjects systematically chose objectively worse-rewarded tasks when those tasks were…
Kahneman, Knetsch, and Thaler's 1990 Cornell mug experiment proved that ownership roughly doubles perceived value.
Robert Zajonc's 1968 paper documented that humans like things more the more often they see them, even when the things are meaningless squiggles.
In 2011, JCPenney hired the executive who'd built Apple's retail empire to do the same for them.
Festinger's 1957 cognitive dissonance research showed that the moment after purchase is when customers are most psychologically vulnerable.
Dan Ariely's MIT candy experiment showed 257% more foot traffic when truffles cost zero instead of one cent.
On October 14, 2012, Felix Baumgartner free-fell 24 miles from the edge of space in front of 8 million live YouTube viewers, with Red Bull's logo on his helmet.
For thirty years Patrick Winston gave a single lecture at MIT called 'How to Speak.' His central claim: the packaging of an idea matters more than its content.
Katzenberg and Whitman raised $1.75 billion before writing a line of code. Quibi launched in April 2020 and shut down by October.
When the Mini Cooper relaunched in the United States in 2002, the marketing didn't hide the car's size — it made the smallness the entire campaign.
Charlie Munger's most useful idea wasn't about investing — it was that behavioral biases compound non-linearly when stacked.
In 1977, Lee Ross at Stanford asked students if they'd wear a sandwich board on campus.
In 1985, Coca-Cola ran 191,000 blind taste tests over four years and spent $4M validating a new formula. New Coke failed catastrophically within three months.
Steve Jobs and Ron Johnson didn't benchmark Best Buy when designing the Apple Store.
In 1885, Hermann Ebbinghaus mapped how human memory decays over time. Coca-Cola's $4 billion annual ad budget is a defense against his curve.
In the 1940s, a New York office building solved a slow-elevator complaint problem by installing mirrors instead of upgrading the lifts.
In 2001, two MIT researchers ran an auction for Boston Celtics and Red Sox tickets.
The average American grocery carries 30,000 SKUs. Aldi carries 1,650. The German discounter run for decades by a pair of reclusive billionaires earns $662…
In 2009, Jared Spool published one of the most consequential UX case studies in modern e-commerce: a major retailer was losing roughly $300M a year because…
Jo Malone had no marketing budget and a single Bergdorf Goodman pop-up.
In 1997, Apple was 90 days from bankruptcy. Steve Jobs walked to a whiteboard, drew a 2x2 grid, put one product in each box, and killed everything else.
In the late 1940s, Chivas Regal was dying. Sam Bronfman doubled the price instead of cutting it — and saved the brand.
Netflix users spend 1.8 seconds evaluating each thumbnail before moving on. The entire $270B business is built around winning that 1.8-second window.
The progress bar on Kayak that says 'Searching 137 airlines...' is fake. The search completed in 50 milliseconds.
Nike didn't win sports by accident. They built a $165B brand by stacking three well-documented behavioral biases — Authority Bias (Milgram, 1961)…
B.F. Skinner's 1957 pigeon experiments on variable reinforcement built every slot machine in Las Vegas.
In 1980, Kmart was ten times bigger than Walmart. By 2002 Kmart was bankrupt.
When a measure becomes a target, it stops being a useful measure. The Cobra Effect is the most colorful illustration of Goodhart's Law — but Wells Fargo's…
Most marketing copy is bad in ways that are research-documented. Present tense beats past tense (Packard, Berger, Boghrati 2023).
In 2009, two Domino's employees nearly destroyed the brand with a viral YouTube video. CEO J.