Chad Thompson (Associate Professor of Linguistics, Department of English and Linguistics, Indiana University-Purdue University at Fort Wayne, US) is one of the very, very few academic researchers to have written on the subject of Yodeling of the Indiana Swiss Amish. His paper ‘Yodeling of the Indiana Swiss Amish’ (published in Anthropological Linguistics,Vol. 38, No. 3, Fall, 1996) was written as a result of field observations conducted between 1993 and 1995.
“For religious reasons, however, they [the yodelling Amish] did not wish to be tape recorded or photographed, and in all cases their desires were respected; no sound recordings were made of interviews or yodelling.“
And, to date, online audiovisual resources regarding Yodeling of the Indiana Swiss Amish are scarce, but Improbable has tracked down one video which claims to show a resolutely non-camera-shy 90 year old Swiss Amish yodelling exponent in action . . .