About the 1985 Carlson experiment
So apparently this test or experiment was designed to see if people could pick their own natal charts, and the other test was to see if the astrolger could pick the persons chart.
Here is a small summary of the test:
"Think of this. An expert astrologer draws up your detailed chart based on your accurate natal data. You are given this horoscope, and two others of different people. Would you be able to tell which one is yours? Because if not, what does it mean to say that astrology works? Whenever this test is done, people are not able to do this with any greater probability than pure chance. (i.e. one in three would get it right.)
Possibly the most detailed test of astrology using this type of method, was performed by Shawn Carlson. His paper, “A Double-blind Test of Astrology”, was published in the peer reviewed scientific journal Nature, in 1985. The interesting thing is that the San Francisco chapter of the National Council for Geocosmic Research recommended the 28 professional astrologers who took part, and (with Carlson), designed the tests. They also predicted, in advance, what they would consider to be a successful test.
Two tests were performed:
Test #1: Astrological charts were prepared for 83 subjects, based on natal data (date, time and place of birth), provided by the subjects. Each subject was given three charts: one chart based on their own natal data, and two charts derived from natal data of other people. Each subject was asked to identify the chart that most correctly described them. In only 28 of the 83 cases, the subject chose their own chart. This is the exact success rate expected for random chance. The astrologers predicted that the subjects would select their own chart more that 50% of the time.
Test #2: 116 subjects completed California Personality Index surveys and provided natal data (date, time and place of birth). One set of natal data and the results of three personality surveys (one of which was for the same person as the natal data) were given to an astrologer who was to interpret the natal data and determine which of the three CPI results belonged to the same subject as the natal data. In only 40 of the 116 cases, the astrologers chose the correct CPI. As with test #1, this is the exact success rate expected for random chance. The astrologers predicted that they would select the correct CPI profiles in more that 50 per cent of the trials.
Conclusion by Carlson:
"We are now in a position to argue a surprisingly strong case against natal astrology as practiced by reputable astrologers. Great pains were taken to insure that the experiment was unbiased and to make sure that astrology was given every reasonable chance to succeed. It failed. Despite the fact that we worked with some of the best astrologers in the country, recommended by the advising astrologers for their expertise in astrology and in their ability to use the CPI, despite the fact that every reasonable suggestion made by advising astrologers was worked into the experiment, despite the fact that the astrologers approved the design and predicted 50% as the "minimum" effect they would expect to see, astrology failed to perform at a level better than chance.
"I have not yet received a serious scientific challenge to the paper. The newsletter of the American Federation of Astrologers Network published a response in January (1986). I was very disappointed to see that it largely consists of personal attacks. Its few substantive criticisms are attributable to ignorance of the experiment, of the CPI, and of basic scientific methodology."
So the astrologers failed their own test. Does this mean they gave up astrology as being useless? Of course not: they are totally closed minded to the possibility that astrology doesn’t work."
That was sent to me from a skeptic who obviously doesn't believe in astrology. It didn't waver me at all but I wanted to know what you all thought about it, and if anybody knows more about this, or any counters against it.