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Joined 2 years ago
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Cake day: September 24th, 2023

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  • N=15 is a normal size on FMRI studies. It is about the smallest size you can have and still make your significance cut offs while still detecting decently small effects. The time and cost is so much higher than other studies. Some of the bigger FMRI studies start to reach 30-40 ppl. Getting into clinical trial sizes of subjects is unheard of.

    The other thing with FMRI studies that most everyone doesn’t understand is that they aren’t actually looking at activity. They are looking at the BOLD response (blood oxygen level dependance) and that is then correlated to activity. Meaning You can only see blood oxygen uptake. You are not seeing neuron firing, just the metabolic side effect of oxygen use after increased neuron use. This is why you will never be able to see something like a “thought process”. You can only track structures/locations used.

    At the same time we know that no two brains are wired the same even for the smallest of tasks, but they will “structure” their wiring the same. There have been literally hundreds of studies that indirectly see that. Soeach other. Plot out cultural differences versus individual differences would be basically two variance plots on top of eachother.


  • Participants 120 We analyzed fMRI data from N = 15 (2 male, 13 female) participants aged between 22 and 35 121 years (mean: 25.5) who took part in a previously published fMRI study about color vision 122 (Bannert & Bartels, 2018). The participants were the subset from the prior study for whom the 123 cortical retinotopic representations of the visual field were measured along both the polar and 124 the eccentricity axis of the visual field. All participants had normal or corrected-to-normal visual 125 acuity and were tested for normal color vision using Ishihara color plates (Ishihara, 2011). Each 126 participant gave written informed consent before the first study session. The experiment was 127 approved by the local ethics committee of the Tübingen University Hospital.

    Ignore the numbers 120-127, those are line numbers.

    Doesn’t say. To be fair, you normally aren’t allowed to collect biographical data or any additional identifying data without a specific purpose tied directly to your research question. If they wanted to answer your question they would have to redo the study under a different IRB application. Interesting question, but I would guess you wouldn’t see a difference in an fmri. The voxel sizes for functional are normally 2mm while what you are eluding to is the difference of a few thousand neurons wired a little differently. That difference would be extremely difficult to detect with 2mm voxels. Even at 1mm it would be difficult. When it comes to brain structures there really aren’t significant different between races or cultures more than the variance that already exists between people.


  • There are some great lists here. I am just going to add- put a whole home water filter on the cold water line of the kitchen sink. It has changed my life. I only need to replace the filter at most once a year, it is on the cold water line that is almost as good a fridge water dispenser would be, but with more pressure. And now when I make pasta, fill up the coffee pot, make tea, or whatever other random kitchen thing that needed water, it is filtered water. Not to mention the clean taste.


  • MrEff@lemmy.worldtoAsk Lemmy@lemmy.worldIsn't this racism?
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    3 months ago

    I did human intelligence. It was literally my job to interact with the people. And we did. And not just to hear what they say to our face, but to get sources and find out what people say behind our backs too. I can, with high confidence, say that close to 90% of the population wanted the taliban gone. It was the other 10% that were the issue. And they were the very loud minority that news stations loved to interview just to claim “accurately showing both sides”.

    Under taliban rule Afghanistan was economically devastated and the second poorest country in the world. They had one of the lowest literacy rates in the world. And they had no healthcare system to speak of other than what was gifted to them from Iran or Pakistan depending of what half of the country you were in. No to mention their lack of infrastructure with the not even completed one highway ring around the country.

    That all changed under ISAF and the people noticed. And now their past is about to become their future.


  • MrEff@lemmy.worldtoAsk Lemmy@lemmy.worldIsn't this racism?
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    3 months ago

    Lol. I did two tours over there. The people loved us. They loved the government. They loved the schools for women. The problem is culturally, they didn’t see a need to fight for it because of apathy. They figured “ISAF was always going to be here, so why need to fight for ourselves? And is ISAF isn’t here anymore, then we can’t support our selves, so why try?” As far as the schools go, they are voluntary. There are no truancy laws. They don’t even take attendance at most of the schools. It was completely up to the family if they wanted to send their boys OR their girls. Under pre-ISAF taliban the literacy rate was about 15% and at the time of withdrawal it was almost 40%. The people wanted to go to school, the taliban just didn’t let most of them or the schools that they did keep open were so severely limited in what they could teach.

    The biggest red flag of this post, to me, is the use of the word Afghani. Any time someone says it with an ‘i’ at the end, you know they don’t know what they are talking about. Afghani is a currency, Afghan is a person.


  • While I understand the resentment of saying an institution is a person, and I agree- they still have constitutional rights. To say that private institutions don’t have a right to free speech is the same as saying that the government is allowed to dictate what companies can and can’t say. Authoritarians would love for you to push that idea.

    Under your same thinking (Harvard isn’t a person and has no right to a first amendment? OK): Then Harvard resisting against the trump administration is illegal and we find it treasonous to be funneling in possible spies from adversarial countries under the guise of education. We need to lock up anyine who works at any higher ed institution unless they can swear loyalty to America (trump) because they might be complicit in this spy ring. And don’t forget, the universities can be searched at any time for evidence and assumed guilty without trial because they aren’t a person and don’t have constitutional rights! Can we charge the university entity with state laws or federal laws? Both! They don’t have rights to protect against double jeopardy!



  • MrEff@lemmy.worldtoAsk Lemmy@lemmy.worldHow Much Have You Lost?
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    6 months ago

    You either lost money, or you lost time. If you are implying that you lost nothing because you didn’t cash out and therefore can wait for a rebound, then you are going to lose the time you have to wait for the rebound. In economics that is also called an opportunity cost. You have now lost the opportunity to invest that money into something profitable because you have now tied it up in something that is unprofitable. You still lost. You are just too dumb to realize it with this mentality.

    Worst case is when people with this mentality ride a stock to the bottom insisting it will just take more time to come back, and it doesn’t. Then forcing the person to lose both the money and the time.