Talk:History of Interlingua

more sources on ease of learning of more or less "naturalistic" auxlangs?
Was any study done on comparative ease of learning of more and less "naturalistic" (in the auxlang-ology sense) auxlangs for monolingual people whose native language is unrelated to the auxlangs source languages? E.g., did [Edward Thorndike]] study the relative ease of Esperanto and Occidental for native speakers of Japanese or some other non-European language? If so, can we get a cite on that one way or another? Thorndike's study is mentioned in this article, but no cite for it is given. --Jim Henry (talk) 19:16, 8 September 2008 (UTC)