if your ring finger is longer than your index finger you have been exposed to high levels of testosterone as a fetus that is between weeks 10 to 15 after fertilization testosterone is needed for penal growth at several points in time in male development so there is a positive correlation between fetal testosterone digit ratio and penile size in adult life I did a separate video on this topic and received a lot of negative feedback at the same time only nine percent of all viewers watch the important part of the video where I explain the meaning of
statistical correlations I even received comments questioning the credibility of the whole Channel because people were not watching the video Until the End so here's a video about medical statistics and correlations in particular why should you care be because medicine biology physiology all that life science stuff is enormously complex don't be naive and expect black or white either or answers you are easily fooled if you believe that a simple life hack in the convenience of your own home that you do only once will do something miraculous to your body you are easy prey for misinformation like
flinging back and forth your penis will make it larger or drinking water eating watermelon and sleeping eight hours a day will restore your erectile function these are only some examples of what I have seen on YouTube lately back to digi ratio and mutual relationship between two or more things is called a correlation the higher fetal testosterone Rises the longer the ring finger becomes the longer the penis will eventually be that's a correlation and it's a sign typically proven fact I didn't make that up however correlations almost never mean that it is always that way so
if you look at your hands and your penis and you think your penis is small despite a male pattern digit ratio it doesn't mean that the correlation is wrong there are other factors that determine the size of your penis most of all it is in your genes if your genetic code says that you are bound to have a small penis you can have all the fetal testosterone in the world and it wouldn't give you a large penis but if fetal testosterone was low chances are that your small penis could turn out even smaller because it
didn't have the chance to grow to its full genetic potential statistical correlations always have to be looked at Large Scale only then it becomes visible because there are always outliers in this case men with a female pattern digit ratio and large penises are men with a male pattern digit ratio and small penises but looking at a large cohort of man the relationship between digit ratio and penile size will become obvious okay that was correlations 101 correlations 201 is that you have to be careful what to correlate because if you have a bunch of data and
you run it through the computer it may calculate a correlation between two variables that look good mathematically but that doesn't make any sense let me give you an easy example every year in springtime the Starks return to Germany more babies are born in the spring than during the rest of the year at least it used to be that way so it would be logical to think that the start brings the babies because there is a correlation between the appearance of storks and babies during spring in medical statistics it is not always that obvious this is
why reading scientific papers is difficult because you need a lot of background information about the subject and medical statistics and a lot of experience because then you will be able to spot typical statistical problems more easily about 10 years back I went to one of the major Urological congresses I think it must have been the AUA 2010 in San Francisco at a medical Congress people present their research in different formats one of those formats is a poster session you print your research on a poster pin it to a board in a designated area and then
you wait for people to drop by to read what you have accomplished and to ask you questions I remember I was looking at a poster from England and it had to do with comparing two kinds of antibiotics and the outcome was impressive so I said to the guys something like great research impressive results and he answered yeah but do you believe it the fact that I remember his answer up until today's shows that it meant a lot to me because it contained an important lesson about research and science the lesson goes like this stay thoughtful
not because someone deliberately tries to screw you over with this research but because things can get very complicated especially with Statistics there may be hidden statistical traps and effects which can make the interpretation of science very tricky the overwhelming majority of scientists are honest people they are not cheating with the results but every study has its downsides it can be anything maybe it's something they didn't think of when they designed the study maybe it's the study subjects who disregard the study protocol like in the plco trial where men from the control arm of the study
went for a PSA test thus contaminating the whole study so it would be wrong to just cite the study as a scientific example that PSA testing is useless without appreciating the fact that contamination messed up the results the world is not either or it is not black or white and this is especially true for the life sciences hope that clears up things for you a bit here is a video about genetics and penile size thanks for watching bye bye foreign
