When doing some research for my book "The Science of Chess" I came across a study on incubation ("thinking aside") in problem solving by Robert Olton:

http://onlinelibrary.wiley.com/doi/10.1002/j.2162-6057.1979.tb00185.x/abstract

Olton spent many years at the University of California, Berkeley, trying to prove that incubation exists. In one study, he used experts trying to solve a problem in their area of expertise - chess players and a chess problem. Olton’s study marked a turning point in the study of incubation. His study was cited in many books (just recently in Kevin Ashton's How to Fly a Horse) and in over 100 scientific publications. The only catch: the original study (with the data) he was referring to in his review-paper actually may have never been published ! Olton cites his own study as “OLTON, R M. Incubation in problem solving: the pause that refreshes? Manuscript submitted for publication, 1979”. Yet, there is no trace of this paper anywhere. It seems that his manuscript may have not passed the referees judgment – and was rejected for publication. Could it be that a whole branch of psychology research is based on a study that actually doesn't exist?

Does anybody have more information on this "lost" study?

Axel

http://onlinelibrary.wiley.com/doi/10.1002/j.2162-6057.1979.tb00185.x/abstract

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