How does the Hermann Rorschach Inkblot test work?

There is a well-known scene in Woody Allen’s (1969) when Virgil Starkwell (Allen) takes a psychological test to join the Navy, but is thwarted by his lascivious unconscious. The psychological measure that proves to be Starkwell’s undoing—rejected, he turns to a life of crime—is the Rorschach inkblot test, devised almost a century ago by Carl Jung’s compatriot and fellow psychologist, . Although Rorschach would die young, at 37, his namesake remains embedded in our perception of psychology, alongside Freud’s couch and Pavlov’s dog.
Speaking of which, take a look at this inkblot, or Rorschach test, the psychiatrist’s use…
Industrial conglomerate ESCO (NYSE:) strikes me as another investment Rorschach test, as how you arbitrate between ESCO's high-potential collection of businesses and its uninspiring historical performance says a lot about whether you trust past performance as a good predictor of future results or whether you believe businesses should be valued based upon what they can do in the future. Finally, if you like, you may also take the Rorschach test online at either of the sites below:Here is an extract from the Wikipedia page about the Hermann Rorschach Inkblot testThe 10 cards of the “Rorschach Test”, also called “inkblot test”, the most famous  created by
The Rorschach technique, sometimes known as the Rorschach test or the inkblot test, is a projective personality assessment based on the test taker's reactions to a series of 10 inkblot pictures.

About this test:
The Rorschach inkblot test is a method of psychological evaluation. Psychologists use this test to try to examine the personality characteristics and emotional functioning of their patients. The Rorschach is currently the second most commonly used test in forensic assessment, after the MMPI, and has been employed in diagnosing underlying thought disorder and differentiating psychotic from nonpsychotic thinking in cases where the patient is reluctant to openly admit to psychotic thinking.

More Information:

There are ten official inkblots. Five inkblots are black ink on white. Two are black and red ink on white. Three are multicolored. The psychologist shows the inkblots in a particular order and asks the patient, for each card, "What might this be?". After the patient has seen and responded to all the inkblots, the psychologist then gives them to him again one at a time to study. The patient is asked to list everything he sees in each blot, where he sees it, and what there is in the blot that makes it look like that. The blot can also be rotated. As the patient is examining the inkblots, the psychologist writes down everything the patient says or does, no matter how trivial. The psychologist also times the patient which then factors into the overall assessment.The Rorschach Test, also known as the inkblot test, is a psychological test that can be used to determine personality characteristics and evaluate emotional health. The Rorschach Test is a projective personality test that works because the subject projects his or her personality onto the ambiguous shape of the inkblot.

The test was invented in 1921 by Hermann Rorschach. The test was most popular in the 1960s, when it was the most widely used projective test in the United States. Today it is used less widely, but it is the second-most popular forensic personality test, after the MMPI.

The test consists of a series of ten inkblots that are presented on white cards. Five of the inkblots are all black, two use black and red ink and three are multicolored. All of the inkblots are nearly perfectly symmetrical.

The test administrator first presents each card in relatively quick succession to the subject. The subject free associates from the cards, offering up whatever words come to mind based on the images. Then the administrator has the subject study each card more carefully.

The test administrator takes highly detailed notes for the duration of the test. These notes include both the subject's verbal responses relating to the content of the cards as well as whether cards were rotated or whether the subject asked any additional questions during the test.

The test results are then analyzed either by the administrator or another certified analyst. One of the scoring systems that is commonly used is the Exner scoring system, otherwise known as the Rorschach Comprehensive System (RCS).

The subject's subconscious associations are revealed through interpretation of the cards and the subject's responses are analyzed to measure emotional and intellectual health and functioning. Each subject's responses are compared to a data pool that demonstrates links between various personality traits and certain responses to the test. There is some disagreement concerning the reliability, validity, and clinical utility of the test and its scoring systems. Diagnoses for clinical disorders should not generally be based solely on the Rorschach test.