Prevalence United States The Rorschach test is used almost exclusively by psychologists. The students still reported seeing a strong positive correlation. These experiments showed that the testers’ prejudices could result in them «seeing» non-existent relationships in the data. August 4, 2009. Retrieved 2010-07-08. Publishing the questions and answers to any psychological test compromises its usefulness. ^ «Copyright Durations Worldwide – EU Copyright». Swiss Federal Institute of Intellectual Property. Containing few features that generate concerns or complicate the elaboration, it is the easiest blot to generate a good quality response about. However currently, another major determinant considered is shading, which was inadvertently introduced by poor printing quality of the inkblots.