Selection Bias: Do You Really See the Whole Picture?

[@sprouts]

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[@pyeitme508]

Plane

[@darkdarten3901]

I don't even have to do the experiment to know the outcome. You might be familiar with your close neighbours, but the farther you go the more you become a "stranger". Since people who are afraid of strangers won't even open the door for you, you will report back that all (or most) people who answered to you said they are not afraid of strangers, when in fact there might be quite a few who are.

[@ShiftyKen08]

I used to work in an auto parts store. I had a customer come in with a set of brake pads to warranty and to buy a new brake rotor. Upon inspection of the pads, I noticed that one side was almost brand new and the other side was worn down to the metal. I told the customer that whatever side the brand new pads came off of needed to have the brake caliper replaced. He thought that the side that was worn needed to be replaced. I asked him to imagine two people pushing a boulder up a hill, but only one was doing the work while the other supervised. When the boulder gets to the top of the hill, who's going to be tired, the worker or the supervisor? He said the worker, and at that, I held up the worn brake pads. He immediately understood and ordered a new caliper for the side that was brand new.

[@blanchebau8807]

This is a bigger issue especially with social media apps, making it easier to put people in danger/manipulate them. Thanks for the informative video!

[@chrisb9365]

Another example are polls and surveys - we only see opinions of people who agreed to be surveyed, and the response rate can be as low as 5%. So we may be ignoring opinions of people who refuse to take part in such research which may heavily skew the data we are looking after. Conversely, people who respond to the survey may have some biases that correlate with their choice of participating in this.

[@sprouts]

True

[@BlackGold805]

I love how each new video you release helps me realize how dumb i am afresh. And the way your animations and sound effects drive home your rather profound arguments both effectively and comically without being obstructive is just genius.

[@sprouts]

Hey, you have a learning mindset and it can never correspond to dumbness. Thank you for your sweet words :)

[@rphb5870]

one of my favourite examples of selection bias comes from one of my old schoolteachers, he always started each class by asking everyone not present to raise their hands

[@Njordin2010]

Really appreciate the dedication to finding the truth in science.

[@richardlynch5632]

Exactly why one must delve deeper into questions, and NOT rely on statistics that may be incomplete due to manipulation of outcomes. 😉👍

[@cjr3559]

If I did 10 neighbors challenge the police would eventually show at my house and start asking ME questions..

[@sprouts]

haha

[@transeditor]

Excellent point. I used statistical sampling techniques in my job for years and was aware of the bias issue in selecting the sample(s).

[@Gruntled2001]

"We conducted a survey among volunteers, and it turns out people really like surveys!"

[@alext8828]

None of my neighbors would answer the door so I couldn't get an answer...or did I?

[@sprouts]

Oh... O_O

[@matheussoares004]

A example of selection bias nowadays is those Instagram doctors who insist that omega-3 alone reduces depression symptoms: they're looking to a few evidence that states so and ignoring the plenty of evidence that says the opposite or that found a neutral effect.

[@ra5gto]

A protected aircraft engine will not matter if the wings carrying the EXPLOSIVE FUEL, that is also necessary for the engine to operate, is vulnerable

[@weltsiebenhundert]

It doesn't explode very often. mostly it just drips out and burns there.

[@MrMastera]

I knocked on 10 doors. Nobody opened. So my deduction is they all have to love strangers.

[@laaaliiiluuu]

Also called survivorship bias.

[@sprouts]

True!

[@davidnorman6348]

Part of the entire picture is that we humans want a quick and clear conclusion. We tend to regard looking into the details as being tiresome and also have difficulties accepting uncertainties or the unknown.

[@waffles_1823]

I interviewed 300 people who played Russian Roulette. The survival rate is 100%.

[@orxanxelilov695]

Super topic

[@josa5463]

Woooow you are great at teaching complicated theories in simple manner 😊

[@taylorgletscher]

I never really believed those political pools they presented in tv and news and whatnot, only to reafirm my beliefs the day I was stopped and asked a few questions... last bit of my interview (roughly translating): Interviewer - "what's your academic level?" Me - "just graduated as an engineer." Interviewer - "Ow, ok... sorry, your info is not needed, we are only asking people without a university degree."

[@MarkUKInsects]

We need more sprouts videos on Biases

[@sprouts]

Glad we think alike ;)

[@williamfranks1215]

My guess would be that me asking my neighbors if they are afraid of strangers would taint the results. Basically, it's a stranger asking if you're afraid of strangers. Creepy and a potential to meet my local law enforcement. 😳 😅

[@lo_azzopardi]

Thank you Sprouts, very good video

[@sprouts]

Glad you enjoyed it :)

[@cricket12ish]

tAKE notes yall this is how influencers get people to believe bullshit is from selection bias

[@joshuasbecreative8444]

Awesome video by the way awesome explanation good job

[@sprouts]

Thanks a lot 😊

[@d.christianrathjens7209]

also the bed is a very dangerous place. Most people end their lives while in bed!

[@poojangohel]

Please Make a Video on SISU the finnish art of courage

[@A3Kr0n]

I won't answer my door if you knock on it so don't waste your time.

[@alext8828]

If you don't answer the door, you've answered the question.

[@Ginger_Hrn]

**KNOCK** **KNOCK** I can save your family from Doulingo

[@enieh112]

@@alext8828 i think that be selection bias.. If you knock on a door while NOT knowing if someone's home, you can't make up your mind that the person IS home and therefore doesn't want to talk. Do not count this as one of ten houses and move on to the next.

[@sprouts]

Haha

[@anakincrespin]

I won't, trick

[@matheuscerqueira7952]

This is why most governments don't fight corruption. If they do, their time in power will be marked by scandals

[@cseonlineclassesmalayalam]

Mind blowing ‼️ is media narrating with selection bias or are we selection biased🤔

[@trevoro.9731]

They get an order for "correct data", invite low income actors to participate (if some visibility of actual population is required) or go to the areas where they find the people they need.

[@OrenLikes]

What is the rate of deaths of non-patients at hospitals vs out of hospitals?

[@brianthomas3910]

lol knock on ten neighbors doors and become the neighborhood weirdo by asking if they’re afraid of strangers… no more Big Bang theory for you, you’ll end up getting a van if get the reference 😂😂✌️

[@G0SE]

great video!

[@sprouts]

Glad you enjoyed it

[@EmiliaHoarfrost]

Went to knock at neightbors. Got shot...

[@sprouts]

O_O

[@timothyspool1399]

I knocked on 10 of my neighbours doors. They were all home but only four answered. They told me that they had no problem with strangers. So four out of four, or 100%, of my neighbours aren't afraid of strangers. Interesting...

[@delinquense]

Shouldn't you have tried to open the door? If they left their door open, wouldn't this speak volumes as to whether they were afraid of strangers or not?

[@sanikaransing]

I don't understand😢

[@pyeitme508]

Interesting 🤔

[@danmcginley3315]

And when women were confronted with the data the refused to admit they were wrong 😆

[@RighteousPaladin]

I'm too afraid of strangers to do the task you've given...either that or I'm too lazy. :P So this is the weakness in pattern seeking, but how could you possibly know you have selection bias unless the sample or statistic is exposed through the addition of a larger context? Is someone's best information invalidated because elsewhere in the universe the majority is the inverse of their every experience?

[@sprouts]

Valid question! Maybe by seeking for other possibilities? Questioning the reliability of any given information! It is only true until it is falsified ;)

[@_-___________]

Did they? No. Most certainly not. I've yet to find someone who believes that reality is a figment of their own imagination. Perhaps its due to the fact that anyone like that wouldn't be interested in research.

[@MiMiGunDK]

maybe not a good idea to knock on the door of your neighbors especially if you live in American

[@scottwinter-sb6lp]

What's with the eggs 🥚 🤫🤭🤣

[@sprouts]

Metaphors! ;)

[@JohnSmith-fo5cx]

so an example of selection bias would be the gender wage gap?

[@Pabz2030]

Climate change *cough*

[@dystopiansoothsayer]

😊😊😊😊😊 😊😊😊😊😊 😊😊😊😊😊 😊😊😊😊😊

[@jameskelly-smith1279]

You forgot to mention purposeful creation of selection bias. Also known as 👉🍒