Evidence attempts to look at correlations between intelligence and creativity from the 1950s onwards, by authors such as Barron, Guilford or Wallach and Kogan, regularly suggested that correlations between these concepts were low enough to justify treating them as distinct concepts. Some researchers believe that creativity is the outcome of the same cognitive processes as intelligence, and that it is only judged as creativity in terms of its consequences, i.e.: when the outcome of cognitive processes happens to produce something novel, a view which Perkins has termed the "nothing special" hypothesis.