Type frequency influences phonological generalizations : eliminating stressed open syllables with short vowels in West Germanic

A pivotal process in the loss of phonological quantity in West Germanic languages is what is traditionally known as Open Syllable Lengthening. Existing accounts have found no explanation for why languages such as English apply this change in less than 50% of the relevant cases. This paper presents the results of a corpus investigation of four West Germanic languages showing that whether Open Syllable Lengthening occurs in more than 50% of predicted cases correlates with the ratio of closed syllables with short vowels to open syllables with long vowels. We interpret this as the result of frequency effects that have markedly shaped the application of Open Syllable Lengthening in West Germanic. This has implications for phonological change in general, as well as for the relationship between stress and syllable structure in West Germanic languages.