These tests are similar to ones designed by Randi, but their only purpose to test whether or not astrology is useful at all. ... no one to my knowledge has ever gotten beyond the first step, .... If you are interested in astrology and think you can figure out why it doesn't work most of the time, by all means do so. ....
I think the Randi type tests don't work because they are asking the astrologer to look at too many variables. With 10 planets and 12 signs there are 120 combinations, and that's not even looking at what degree a planet is in the sign. There are 30 degrees in each sign so that makes 3600 combinations. And there are 12 houses, so that makes ...well, a lot of different types of birthchart, and that is just for a birth chart
without a birth time. Then we have to look at the angles that the planets make to themselves, and the patterns they make (bucket, train, splash to name a few). There are as many different birth charts as people on the planet; each one has our own individuality stamped on it. An astrologer's skill would lie in the ability to sythesize all this information, comparing it to cases he had studied before and then make an "educated guess".
Some astrologers do have "hits", but most don't. I remember the one and only time that I predicted* something was was when I said that Brad and Jenn would get back together! But my failure does't make me think that astrology has no value. It just showed me that this is not the way to conduct research.
*In a previous post I said that astrology cannot predict the future, at least human behavior in the future, (because everyone has free will), but this doesn't stop astrologers from sometimes trying, if it is harmless and about celebrities.
The correct way to do research is to test
each variable at a time.For example, look at 100 birthcharts with Mars in the 1st house and try to correlate that with a definite personality (1st house) trait. The first part is easy - computer software will sort through thousands of charts in seconds to dig out the ones with Mars in first house, but the second bit is tricky, because it's psychological, and as we discussed before, much of psychology is subjective. In this case - the first house, Mars is
supposed to indicate Martian, ie. strong, poweful traits in the physical body, but suppose Mars had an opposition to Saturn, or a square to Neptune? That would temper that supposition. This is why computer horoscope reports are sometimes not very accurate, because only a real person can synthesize all the aspects, or try to.
So, as you can see, research is very difficult, and not very glamorous. There are people doing this research and you can see some of it online or in papers.
By the way, your experiment, ChristineR, with the birth charts all from the same month is actually quite a good idea, as it would demonstrate the differences correlated with different Moon positions and different ascendants and houses, and the different angles made between the planets themselves, and to the ascendant. But, as explained above, it would still be a very difficult test. Another thing to point out is that people born in different hemispheres, for example England and Australia, in the same month, will have the same zodiac Sun sign but completely different environmental conditions; for example, December is summer down under.
Since I am back in this thread, at least for a while, I want to take the opportunity to respond to
Garette's last post asking why I didn't respond to the list of statements that I had made in this thread, which were:
It isn't scientific
It has not been shown to be better than would be predicted by chance
It doesn't predict anything
It does predict things
It postdicts things
It's for entertainment only
It gives advice
It has, at best, superficial correlation--recognized only in hindsight--as its evidence for validity
Well, admittedly this seems confusing. But these quotes are all taken out of context. If you go back and read the whole posts where these quotes come from (and quite frankly I've forgotten which ones they were), they will hopefully make sense in the context of the whole post. I also did not respond to your post about medicine, Garette, as it was getting a bit off topic, and there are lots of other threads on this forum which are covering drugs and medicine.