Several times over the past few years, I've speculated that American "uptalk", stereotypically associated with Californian "Valley Girls" in the 1980s, might in fact have originated with the characteristically rising intonational patterns of northern England, Scotland, and Ireland, by way of the Scots-Irish immigrants who migrated to California in the 1930s Dust Bowl exodus. For example,
It seems plausible to me that "uptalk" in the U.S., Canada, New Zealand, and Australia represents the spread (or in some cases just the observation) of a pattern that's been normal in some regional varieties of English for a thousand years or more, originally representing the results of contact with Celtic and/or Scandinavian languages. In the U.S., the history might involve the people of Scots-Irish background who migrated to California during the Dust Bowl era in the 1930s, who formed a substantial part of the ethnic background of the "valley girl" stereotype.
There's a fair amount of evidence out there about how the "Okies" talked — so for this morning's Breakfast Experiment™ I thought I'd take a first look, starting with Alan Lomax's 1940 interview with Woody Guthrie, in which Woody reminisces about his boyhood in Okemah, Oklahoma.