The psychology behind irrational decisions - Sara Garofalo

2,329,335 views ・ 2016-05-12

TED-Ed


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Prevoditelj: Mirela Ivoš Recezent: Sanda L
00:06
Let's say you're on a game show.
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Recimo da ste na kvizu.
00:08
You've already earned $1000 in the first round
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Već ste osvojili 1000 dolara u prvome krugu
00:12
when you land on the bonus space.
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kada otvorite bonus polje.
00:14
Now, you have a choice.
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Sada imate izbor.
00:16
You can either take a $500 bonus guaranteed
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Možete uzeti 500 dolara zagarantiranog bonusa
00:20
or you can flip a coin.
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ili možete bacati novčić.
00:22
If it's heads, you win $1000 bonus.
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Ako je glava, osvajate bonus od 1000 dolara.
00:25
If it's tails, you get no bonus at all.
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Ako je pismo, ne dobivate ništa.
00:29
In the second round, you've earned $2000 when you land on the penalty space.
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U drugome krugu osvojili ste 2000 dolara kada otvorite kazneno polje.
00:34
Now you have another choice.
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Sada imate drugi izbor.
00:36
You can either take a $500 loss,
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Možete izgubiti 500 dolara
00:39
or try your luck at the coin flip.
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ili iskušati svoju sreću novčićem.
00:42
If it's heads, you lose nothing,
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Ako je glava, ne gubite ništa,
00:44
but if it's tails, you lose $1000 instead.
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ali ako je pismo, tada gubite 1000 dolara.
00:49
If you're like most people,
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Ako ste kao većina ljudi,
00:50
you probably chose to take the guaranteed bonus in the first round
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vjerojatnije je da ćete u prvome krugu uzeti zagarantirani bonus
00:54
and flip the coin in the second round.
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i baciti novčić u drugome krugu.
00:57
But if you think about it, this makes no sense.
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Ali ako razmislite, to nema smisla.
01:00
The odds and outcomes in both rounds are exactly the same.
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Šanse i ishodi u oba su kruga jednaki.
01:04
So why does the second round seem much scarier?
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Zašto se onda drugi krug čini strašnijim?
01:08
The answer lies in a phenomenon known as loss aversion.
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Odgovor leži u fenomenu poznatom pod nazivom averzija prema gubitku.
01:13
Under rational economic theory,
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Prema teoriji racionalnog izbora,
01:15
our decisions should follow a simple mathematical equation
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naše odluke trebaju slijediti jednostavnu matematičku jednadžbu
01:18
that weighs the level of risk against the amount at stake.
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koja procjenjuje razinu rizika nasuprot iznosu koji je u pitanju.
Ali istraživanja su pokazala kako je za mnoge ljude
01:23
But studies have found that for many people,
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01:25
the negative psychological impact we feel from losing something
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negativni psihološki utjecaj osjećaja gubitka nečega
01:29
is about twice as strong as the positive impact of gaining the same thing.
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otprilike dvaput veći od pozitivnog utjecaja dobivanja iste stvari.
01:34
Loss aversion is one cognitive bias that arises from heuristics,
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Averzija prema gubitku je kognitivna pristranost nastala iz heuristika,
01:39
problem-solving approaches based on previous experience and intuition
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pristupa rješavanju problema temeljenog na prethodnom iskustvu i intuiciji,
01:43
rather than careful analysis.
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radije nego na pažljivoj analizi.
01:46
And these mental shortcuts can lead to irrational decisions,
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Ti mentalni prečaci mogu dovesti do iracionalnih odluka,
01:50
not like falling in love
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ne poput zaljubljivanja
01:51
or bungee jumping off a cliff,
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ili bungee jumpinga s litice,
01:53
but logical fallacies that can easily be proven wrong.
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nego logičkih pogrešaka za koje se lako dokaže da su pogrešne.
01:57
Situations involving probability are notoriously bad for applying heuristics.
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Situacije koje uključuju vjerojatnosti notorno su loše za primjenu heuristika.
02:03
For instance, say you were to roll a die with four green faces and two red faces
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Na primjer, recimo da bacate kocku s četiri zelene i dvije crvene strane
02:09
twenty times.
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dvadeset puta.
02:10
You can choose one of the following sequences of rolls,
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Možete birati jednu od ponuđenih opcija ishoda bacanja
02:13
and if it shows up, you'll win $25.
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i ako se pojavi, osvajate 25 dolara.
02:17
Which would you pick?
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Koju biste odabrali?
02:18
In one study, 65% of the participants who were all college students
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U jednom istraživanju, 65 % sudionika, od kojih su svi bili studenti,
02:23
chose sequence B
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odabralo je opciju B
02:26
even though A is shorter and contained within B,
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iako je A kraća i sadržana unutar B,
02:29
in other words, more likely.
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drugim riječima, vjerojatnija je.
02:31
This is what's called a conjunction fallacy.
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Ovo se naziva pogreškom reprezentativnosti.
02:35
Here, we expect to see more green rolls,
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Očekujemo da ćemo vidjeti više zelenih kockica
02:37
so our brains can trick us into picking the less likely option.
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te nas mozak može zavarati da odaberemo manje vjerojatnu opciju.
02:41
Heuristics are also terrible at dealing with numbers in general.
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Heuristici su općenito loši kada su u pitanju brojevi.
02:45
In one example, students were split into two groups.
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U jednom primjeru studenti su podijeljeni u dvije grupe.
02:49
The first group was asked whether Mahatma Gandhi died before or after age 9,
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Prva je grupa upitana je li Mahatma Gandhi umro prije 9. godine,
02:54
while the second was asked whether he died before or after age 140.
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dok je druga upitana je li umro nakon 140. godine.
03:00
Both numbers were obviously way off,
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Oba su broja daleko od točnog,
03:02
but when the students were then asked to guess the actual age at which he died,
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ali kada se od obje grupe tražilo da pogode u kojoj je godini zapravo umro,
03:07
the first group's answers averaged to 50
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prosjek odgovora prve grupe bio je 50,
03:09
while the second group's averaged to 67.
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a druge 67.
03:13
Even though the clearly wrong information in the initial questions
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Iako su očito krive informacije u početnim pitanjima
03:16
should have been irrelevant,
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trebale biti nebitne,
03:18
it still affected the students' estimates.
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one su i dalje utjecale na procjene studenata.
03:21
This is an example of the anchoring effect,
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Ovo je primjer efekta sidrenja
03:24
and it's often used in marketing and negotiations
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i često se koristi u marketingu i pregovaranjima
03:27
to raise the prices that people are willing to pay.
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kako bi se podigle cijene do onih koje su ljudi spremni platiti.
03:31
So, if heuristics lead to all these wrong decisions,
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Dakle, ako heuristici dovode do svih ovih krivih odluka,
03:34
why do we even have them?
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zašto ih uopće imamo?
03:36
Well, because they can be quite effective.
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Pa, jer mogu biti prilično učinkoviti.
03:39
For most of human history,
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Kroz većinu ljudske povijesti
03:41
survival depended on making quick decisions with limited information.
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preživljavanje je ovisilo o brzom donošenju odluka uz ograničene informacije.
03:45
When there's no time to logically analyze all the possibilities,
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Kada nema vremena da se logički analiziraju sve mogućnosti,
03:49
heuristics can sometimes save our lives.
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heuristici nam ponekad mogu spasiti život.
03:52
But today's environment requires far more complex decision-making,
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Ali današnja okolina zahtijeva daleko kompleksnije donošenje odluka
03:56
and these decisions are more biased by unconscious factors than we think,
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i te su odluke ovisnije o nesvjesnim faktorima nego što mislimo,
04:01
affecting everything from health and education
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utječući tako na sve, od zdravlja i edukacije
04:03
to finance and criminal justice.
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do financija i kaznenog pravosuđa.
04:06
We can't just shut off our brain's heuristics,
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Ne možemo samo isključiti heuristike u mozgu,
04:08
but we can learn to be aware of them.
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ali ih možemo naučiti biti svjesni.
04:11
When you come to a situation involving numbers,
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Kada se nađete u situaciji koja sadrži brojeve,
04:13
probability,
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vjerojatnosti
04:14
or multiple details,
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ili više detalja,
04:16
pause for a second
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zastanite na sekundu
04:18
and consider that the intuitive answer might not be the right one after all.
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i razmotrite da intuitivni odgovor možda ipak nije onaj pravi.
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