Look at how we make decisions Automatic processes evolved over millenia Not always right - optimised for survival Learn to be aware of when they may be wrong
Tested on thousands of students At Princeton, MIT and Harvard: more than 50% said “10p” Other universities: more than 80% said 10p
Students at New York University aged 18-22 Asked to assemble sentences using four words out of five One group: half sentences have “old people” words in Afterwards, walk down corridor for another test Walk took statistically significantly longer in the old group
Hands up who believes which Actually born 1889, but most believe the bold font - easier to read
Front page advert in University of Michigan student newspaper Frequency: 1, 2, 5, 10, 25 Ask for impression of each word: “something good” or “something bad” More frequent = more favourable
Who would you most like to work with?
Average among subjects who saw 10: 25% Average among students who saw 65: 45%
Rawnet Lightning talk - 'Thinking, Fast and Slow' review
Thinking, Fast and Slow
How We Make Decisions, And How To Make
The Right Ones
Not my ideas...
Nobel Prize for
A Tale Of Two Systems
Fast, intuitive, subconscious
Slow, analytical, directed
Looking for patterns
Can be overwhelmed
A bat and a ball together costs £1.10
The bat costs £1 more than the ball
How much does the ball cost?
Was Gandhi more or less than 141 years old
when he died?
How old was Gandhi when he died?
Anchoring With Irrelevant Information
Rigged wheel of fortune
Always 10 or 65
Write down the number
“Is the percentage of African
nations in the UN higher or
lower than this?”
“What is the percentage?”
So… What Can We Do?
You can’t stop System 1
You shouldn’t stop System 1
Be aware of System 1 biases
Watch Out For Biases