It is called the Cognitive Reflection Test (CRT) and has been hailed by everyone as the shortest intelligence test with impressive results.
Some even say that with just three questions you can distinguish the Einstein of this world from the… less Einstein.
The test was developed by Princeton University in 2005 and by academic psychologist Shane Frederick and is not a joke. As what really matters is our ability to ignore instinctive responses and think slowly and carefully. And logically, always!
As academics say, the test measures how good one is at ignoring System 1 (intuition) for the sake of System 2 (analytical thinking). In order to succeed, one must spend time thinking about one's answer and ignoring one's first response.
In its scientific version, it naturally measures reaction time. But also the correctness of the answers. When weighed in 2003, the psychologist was surprised to find that even top Harvard and Yale students made a fuss. Today he tells us that only 17% of those who tried it achieved the perfect score…
1. A cane and a ball cost $ 1,10 in total. The cane costs $ 1 more than the ball. How much does the ball cost?
2. If it takes 5 machines 5 minutes to make 5 parts, how much will it take 100 machines to make 100 parts?
3. In a lake, there is a colony of water lilies. Every day, the colony doubles in size. If it takes 48 days to cover the whole lake, how many days will the colony need to cover half the lake?
Did you think about it well? Are you ready for the answers? Scroll down to see what you did…
1: 5 cents. The ball costs 5 cents, the cane 1,05 ($ 1 more) and the two together $ 1,10. Admit it, 10 cents was your intuitive answer. Princeton tells us that whoever answers "10 cents" is significantly less patient and methodical than the one who gives the correct answer.
2: 5 minutes. You instinctively answered for 100 minutes. Fortunately, it does not take that long. From the question it follows that each machine takes 5 minutes to make a component. So it takes 5 minutes on 100 machines to make 100 parts.
3:47 days. And not 24 that most people think of immediately. The water lilies double every day, so when they reach half of the lake, the next day they will cover the whole.