We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleEffects of environmental complexity and training on brain chemistry.AuthorsKrech, David; Rosenzweig, Mark R.; Bennett, Edward L.PublicationJournal of Comparative Psychology, 1960, Vol 53, Issue 6, p509ISSN0021-9940Publication typearticleDOI10.1037/h0045402