本稿では山形県庄内地方の南北を貫くグロットグラム調査の結果を分析する。共通語化とそれに一見逆行する新方言に着目して、多数項目を計量的に扱って、変化と伝播の様相を探る。地域差については、新方言も標準語形も、鶴岡市と酒田市が伝播の中心であり、南端や東の山間部や北端は、鶴岡市のことばの影響の少ない地域であることが分かった。一方年齢差を見ると、新方言も標準語も若年層に多い。総合的にグラフ化し、都市と農村のことばの違いを、具体的に確認できた。日本全体の伝播を考えると、地方都市は中央のことばを受け入れる中間段階の役を果たすと考えられ、「二重雨傘モデル」を設定することができる。
This paper analyzes the results of a glottogram survey that runs through the Shonai region of Yamagata Prefecture from north to south. Focusing on the standardization and the new dialects that seemingly run counter to it, a large number of items are treated quantitatively to explore the aspects of change and propagation. Geographically, it was found that Tsuruoka City and Sakata City were the center of propagation for both the new dialect and the standard form. The southern mountainous area and the northern end of the region are areas where the influence of the language of Tsuruoka City is minimal. On the other hand, age differences show that both the new dialect and the standard language are more common among the younger generation. We were able to concretely confirm the differences in the language between the medium-sized cities and rural areas. Considering the propagation in Japan as a whole, local cities can be considered to play the role of an intermediate stage that accepts the new language changes, and a "double umbrella model" can be created.