Double Ninja'd. Who knew that watching stupid videos on Youtube using Wi-fi could hurt your reproductive skills.... wait a second!CM156 said:I pulled pretty much the same thing.DVS BSTrD said:*Looks at laptop in his lap*
Oh shit!
29 subjects is actually sufficiently large for statistical purposes if you're not dividing them into groups. If you take a Stats class (and you should, because Stats is awesome), you'll notice pretty quickly that a 30-subject sample provides you with a pretty scary level of confidence even for huge populations. Late-Phase Clinical Trials for drugs use much higher numbers because of the seriousness of potential errors and the need to run the trial on many different populations, but for the purposes of this kind of experiment 29 is honestly kinda on the large side.dyre said:I assume the control group was a bunch of sperm next to non-wifi laptops, not just a bunch of sperm sitting on a table?
Also, what's up with the tiny sample sizes? All the studies I read about on the internet seem to be content to study under the standard minimal sample size of 30 people :\ (and imo 30 is really small)
---jonnosferatu said:Contrary to what is, apparently, popular belief, people with Ph.D.s are not, as a rule, COMPLETE morons. Chances are, an Escapist writer not thinking to clarify something about the experimental parameters does NOT mean that that something was neglected when the experiment was being designed. If you're concerned that they did not control for temperature, READ THE SOURCE ARTICLE. If that article doesn't help, READ THE PAPER. You do not need to understand technical terms to figure out the process used in an experiment.
The Journals in which these papers are published are almost ALL peer-reviewed. Getting published in one does not guarantee that your work is of a high quality, but it is a pretty good sign that something as elementary as "Did they control for temperature" is answered IN THE PAPER, since it's just as much of a big deal for other researchers as it is for everyone else.
The fact that other, similar research (or in some cases a complete lack of it, and an overactive imagination) has been abused in the past does not mean that this paper does not present valid conclusions. I apologize if that's not what you're saying but I think that this needs to be clarified:wooty said:They used to say the same about mobile phone signals and brain damage, heart problems, sperm count......GENERAL PUBLIC! BE SCARED!! DO NOT LEAVE YOUR HOMES AND BUY BONDS!
I may be misinterpreting what you mean here, but the fact that it was tested outside of the body does NOT mean there is no cause for concern - just that the cause for concern has more to do with conducting more research than with actually changing behaviors. Research projects don't happen in massive steps - they happen in very small ones, with each step having a paper associated with it. A paper describing an In Vitro experiment in this field is almost certainly NOT going to be the last step, but that does NOT mean that the results of the experiment are "nonsense."VanityGirl said:OT: If it was tested outside the body, then I wouldn't think there would be much cause for concern... I'd need more testing before I'd believe that nonsense.
Reading the paper reveals very quickly that they actually said "DNA Fragmentation" (read/skim the paper - it's not hard), something that does not trigger apoptosis in sperm but is believed to reduce fertility rates. Again, as stated above, this article was published in a peer-reviewed journal, meaning it was approved by a number of respected scientists who are probably not morons. If you think there is an issue with the research, read the paper and do some research on anything that seems odd.Gevas said:Why are sperm cells special? Significant DNA damage is going to cause apoptosis in any cell. I'm not likely to believe it just by what they're saying, if 9% of my cells died near a wireless system every 4 hours, there wouldn't be much of me left...
They probably decided to try it because it would:William Fleming said:I don't know how to respond, why would someone even think about trying this? Also, just as the article mentioned, the decrease in quality might be because of sperm being outside the body, not being under Wi-Fi.
I appreciate your skepticism and attempts at critical thinking, but as I've stated several times elsewhere in the post (and as is common knowledge to ANYONE with a significant scientific background), professional researchers are generally not morons. If you think you see a potential problem with their work, READ THE PAPER. I can almost guarantee that whatever problem you - someone who is probably NOT a professional researcher in the relevant field - think is there probably isn't, because professional researchers are generally not morons.Vrach said:OT: I'm amazed by how narrow these studies are. Have they placed comparative sperm next to other things? Like a laptop without a wi-fi? Or just left them alone in the same conditions? Last I checked, putting your sperm in a random area is not a way to keep it fresh, you need to take steps to actively preserve it, have those steps been taken and a laptop was just sitting in that environment too?
Considering I imagine it has to be kept refrigerated at a certain temperature and laptops aren't too cool (ba dum tish) with those temperatures, I'm leaning towards agreeing with Greg's skepticism.
It's funny you should say that, given that they had a control group kept under virtually identical conditions with the WiFi as the only significant difference between the two. Again:aashell13 said:This experiment seems very badly controlled
Would you mind clarifying why, exactly, you think it is "highly unlikely" that this experiment holds any water? The researchers do not state that there it demonstrates an effect In Vivo (largely because it was not designed to demonstrate such an effect), and there's strong evidence for the researchers' conclusions about what happens under these conditions In Vitro. Where's the problem?OmniscientOstrich said:Eh, even in the highly unlikely event that this experiment actually holds any water
Correct, there is no proof that the damage is long-term...from a single four-hour period of In Vitro exposure. However (and assuming it generalizes to In Vivo, which would require another experiment), what about chronic exposure?Screamarie said:I love how everyone is saying that every man would be sterile if this is true. I mean since they didn't test the sperm while still inside the human body, there's no proof that the damage is long term, you may just have to..."get rid of"...the bad sperm and let new sperm form...though I realize how difficult this would be and you would never know if you had viable sperm or not.
But other than that I think this is kind of a fucked up study. I mean this could have just as easily been caused by the heat the laptop gives off. And if this were true we'd already be seeing the effects as most guys have something connected to wifi near there junk most of the time and yet healthy, happy babies are born everyday.
Which is why they kept the control group at the same temperature. Again, professional researchers are generally not morons.GeoPB said:Heat is bad for your balls. Fact.
Again, professional researchers are generally not morons. Read the paper. Statistical analysis of the results indicates that there is a difference in the means of the experimental and control groups, P=0.01 - or, in other words, there is a 99% chance that the two groups have different properties. Furthermore, as you would know if you had read the paper, the DID control for the effects of temperature, and do NOT claim that their research in any way proves that this effect would be observed in humans - it only SUGGESTS that there may be something worth investigating.Istvan said:Very imperfect and flawed test, completely useless. When the control group gets just about the same result as the shocking test group, and when they don't mention that they took account of the heat or the shielding that the body provides ro anything else that might influence it, then I seriously doubt the validity of this study.
It's funny you should say that about a study that was:Stealthygamer said:maybe the sperm cells were just dying FROM THE HEAT
Then it's a good thing that they were testing sperm motility, not sperm survival rates. Most of the rest of my responses have featured read the paper, but in your case I think a more relevant request would be read the article.OriginalLadders said:Sperm start dying the second they leave your body.
Firstly, as anyone who has even the SLIGHTEST background in statistics can tell you, "29" is a pretty decent sample size, especially for an In Vitro pilot study. This experiment was not designed to demonstrate any large-scale In Vivo public health effects, as you would know if you had read the paper. In terms of the group effect aspect, you would also know if you had any real background in statistics that most traits in a given population follow some manner of normal distribution (ie a bell curve) and that results from a large sample of that population are therefore likely to generalize to most members of that population as a whole. Further, as noted above, this experiment was NOT designed to test conditions for cell death, and I have no idea why you could think it was if you had read the article. Not even the paper this time - this is literally the subject of the article.Baresark said:Interesting. 29 Healthy men does not a study make. You would need to repeat this with hundreds, if not thousands of men to get any meaningful results. And then it would just be numbers indicating a group effect and have no bearing on actual results regarding individual humans. Also, take into effect that sperm is protected inside the body which would change the results completely.
Ahhh, science. I remember when we used to have picnics together and talk about your very specific process... those days seem behind us now that any Tom, Dick, or Harry seem to think they understand you. I miss... US! *openly weeps*
Also, this. Sperm may only live for at maximum, a few hours outside a body. Many swimmers start dying within a few minutes.OriginalLadders said:Sperm start dying the second they leave your body.
This can't be real, any biologist in this field would know that.
Not going to go into detail on the sterility thing because I've addressed that several times already. I'll just leave it with "The experiment was not designed to say anything about sterility, read the article." If possible also read the paper.Lokithrsourcerer said:bullshit if that was the case we'd all be sterile by now you are constantly bombarded with wireless signals just look at how many wireless networks are visible at all times.
like the so-called evidence that homoeopathy works i think this will fall flat on it's balls when it hits peer review and double blind study
if its not in respected science publication like science magazine or new scientist it is probably bollox
Not going to bother addressing this in detail, given that I've been writing for something like 2 hours now, but basic gist of my response:Torrasque said:The only way I would give a damn about this study's findings, is if it said anything about damaging the sperm factories.
Having a few million sperm die is no big deal since I passively create billions over weeks, but if the factories were damaged, then that might cause a bit of concern.
Of course, there is still some question about the validity of this study, like all studies involving "THIS TECHNOLOGY HURTS THIS".
Care to elaborate? The evidence for the researchers' conclusions is pretty - there's a 99% chance (literally - this is what is meant by P=0.01 in the paper) that the observed reduction in motility was observed because there actually WAS a reduction and not just randomly. If you think that that means that WiFi poses a significant thread to fertility levels in the general public, yes, that's bullshit - in that that's not what the researchers are saying and anyone telling you it is either stupid, ignorant, or lying.SmashLovesTitanQuest said:No, seriously, this is a load of bullshit.
shadowelancer said:Does nobody think that maybe it may have to do with the fact that they apparently had the container UNDERNEATH the laptop?
I've calmed down a bit at this point but I'm going to reiterate as I have several times above:Frylock72 said:Laptops get pretty hot, especially after continuous use. Isn't it possible that the heat from them is what killed the extra sperm?
As noted above, they controlled for the effects of heat. Again, professional researchers are generally not morons. This study is not useless - as you would know if you had read the paper - as it demonstrates that there is strong evidence that WiFi does have an effect on sperm motility In Vitro. It does not CLAIM to prove anything about sperm still in the human body, and if there was evidence of reduced In Vivo motility further investigation would need to be done to determine the long-term effects of occasional and frequent exposure.dmase said:I thought they did this study a thousand times already and came to the conclusion it was the heat the laptops put off that cause the sperm to die off. This really is a useless experiment and proves nothing about wifi. Electro magnetism maybe but it's just heat causing it i'd guess, also it's far more important to know if it affects reproductive organs. You can replace all of the sperm in a couple days the balls... less so.
We already knew that, which is why the study doesn't look at death rates. Did you even read the article?weirdguy said:Congratulations, we've discovered that sperm die outside of the human body.
FROM EXPOSURE.
This would be one of the only good posts in thread...were it not for the fact that your assumptions (and therefore everything you computed based on them) are entirely incorrect. This is something you would know if you had read the paper.Caffiene said:Really?
Ok, lets do the math here.
29 men. With a control group: 14 or 15 people in each group. 25% of the test group: 3.75. 9% of the test group: 1.35. 14% of the control group: 1.96. 3% of the control group: 0.42.
What we're looking at here is noise. And thats assuming theres even any relationship between collected samples and internal sperm, and assuming that the control was properly done (was it put under a laptop that was producing the same heat but with WiFi turned off?)
1) Significant contradictory research in this case would be a number of experiments performed under similar-to-identical conditions demonstrating that the results of this experiment cannot be replicated. As far as the researchers are aware, this is the first time ANYONE has done an experiment with these conditions and published the results. It's possible that a number of other sperm researchers who decided not to submit their results for peer review will write to the Journal in question to say that they had done this experiment earlier with no such results, but we'll have to wait before that becomes apparent.WiFi is non-ionising radiation. It is orders of magnitude less powerful than visible light. This is nowhere near a significant enough result to even bother reporting, given that there is no plausible mechanism and significant contradictory research.
hey, I DID take a stat class! But all I did was memorize the methods the prof taught and when to use them >_>jonnosferatu said:29 subjects is actually sufficiently large for statistical purposes if you're not dividing them into groups. If you take a Stats class (and you should, because Stats is awesome), you'll notice pretty quickly that a 30-subject sample provides you with a pretty scary level of confidence even for huge populations. Late-Phase Clinical Trials for drugs use much higher numbers because of the seriousness of potential errors and the need to run the trial on many different populations, but for the purposes of this kind of experiment 29 is honestly kinda on the large side.dyre said:I assume the control group was a bunch of sperm next to non-wifi laptops, not just a bunch of sperm sitting on a table?
Also, what's up with the tiny sample sizes? All the studies I read about on the internet seem to be content to study under the standard minimal sample size of 30 people :\ (and imo 30 is really small)
And yes, the control group were kept at the same temperature, albeit without the laptop. This should control for temperature, though they certainly could have been more specific about it.
I actually wrote the other post first and then decided that my response to you didn't belong in with the rest of them.dyre said:hey, I DID take a stat class! But all I did was memorize the methods the prof taught and when to use them >_>jonnosferatu said:29 subjects is actually sufficiently large for statistical purposes if you're not dividing them into groups. If you take a Stats class (and you should, because Stats is awesome), you'll notice pretty quickly that a 30-subject sample provides you with a pretty scary level of confidence even for huge populations. Late-Phase Clinical Trials for drugs use much higher numbers because of the seriousness of potential errors and the need to run the trial on many different populations, but for the purposes of this kind of experiment 29 is honestly kinda on the large side.dyre said:I assume the control group was a bunch of sperm next to non-wifi laptops, not just a bunch of sperm sitting on a table?
Also, what's up with the tiny sample sizes? All the studies I read about on the internet seem to be content to study under the standard minimal sample size of 30 people :\ (and imo 30 is really small)
And yes, the control group were kept at the same temperature, albeit without the laptop. This should control for temperature, though they certainly could have been more specific about it.
thanks for the info though
edit: lol, woah, I noticed that after your response to my post, you responded to everyone else in the thread. You seem to be a bit miffed at people not bothering to read the paper >:O. But to be fair, the paper wasn't even linked, and well, to laymen like myself, scientific papers are boring as fuck to read. I usually don't get past the abstract. And when I get to the method section...ugh. We're usually supposed to just read the summary from the news writer :\
Hmm, ok, fair enough. About being upset about people dismissing research without actually reading the research, that is.jonnosferatu said:I actually wrote the other post first and then decided that my response to you didn't belong in with the rest of them.
I recognize that the paper isn't directly linked, but a vital part of critical thinking (and reading ANY news article) is to pay attention the source. Greg didn't do a horrible job, but AFAIK he isn't a science writer by any stretch of the imagination, and the guy who wrote the Reuters article isn't a very good one. Following the source is actually pretty fast for most articles like this one, because sites like Reuters generally link directly to the paper.
I also probably should have mentioned (as I will in the thread I'm writing on this, pretty much in response to this one) that nobody actually READS the methods section unless they're trying to design a follow-up experiment. Usually the sequence goes:
Abstract -> Conclusions -> Results (look for tables and graphs to verify Conclusions)
After that we might skim the Methods, but only if we're particularly interested in how the research was done or want to make an argument about its validity.
THAT SAID, I don't mind people not reading the original paper or even a Reuters piece on it. What I DO mind is people reading about research and then making very stupid statements about it, which is what happened here. Reading this thread was actually a very good thing for me, because it reminded me of something I'd forgotten: The main reason that so many discoveries are overlooked or rejected in the popular consciousness is that people who don't know what the fuck they're talking about won't let that stop them from chiming in. This is a problem.
(I'd write something about Global Warming here but I'm pretty sure you get the gist of what I'd say just by my mentioning it)