Compensatory lengthening in phonology and historical linguistics is the lengthening of a vowel sound that happens upon the loss of a following consonant, usually in the syllable coda. An example from the history of English is the lengthening of vowels that happened when the voiceless velar fricative/x/ was lost. For example, in Chaucer's time the word night was pronounced /nixt/; later the /x/ was lost and the /i/ was lengthened to /iː/ by compensatory lengthening. (Later the /iː/ became /aɪ/ by the Great Vowel Shift.) The vowels of modern (Standard) Arabic and (Israeli) Hebrew from the phonological point of view. ... Historical linguistics (also diachronic linguistics or comparative linguistics) is primarily the study of the ways in which languages change over time. ... Note: This page contains IPA phonetic symbols in Unicode. ... A consonant is a sound in spoken language that is characterized by a closure or stricture of the vocal tract sufficient to cause audible turbulence. ... Note: This page contains phonetic information presented in the International Phonetic Alphabet (IPA) using Unicode. ... English is a West Germanic language that originated from the Anglo-Frisian dialects brought to Britain by Germanic settlers from various parts of northwest Germany. ... The voiceless velar fricative is a type of consonantal sound used in some spoken languages. ... Chaucer: Illustration from Cassells History of England, circa 1902. ... The Great Vowel Shift was a major change in the pronunciation of the English language, generally accomplished in the 15th century, although evidence suggests it began as early as the 14th century. ...
that is apparently not pronounced, this fricatives has gone into lengthening or diphthongising the preceding vowel.
As you can see, it's not much of an issue anymore, as most of the conservative (regarding lengthening) dialects of East Perthshire, Kintyre and Arran are mostly moribund today.
So to be brief, all that needs to be said about these dialects is that in almost all cases these dialects either lenghten the vowel or simply have a short vowel, but hardly ever dipthongise.
Compensatorylengthening in phonology and historical linguistics is the lengthening of a vowel sound that happens upon the loss of a following consonant, usually in the syllable coda.
An example from the history of English is the lengthening of vowels that happened when the voiceless velar fricative /x/ was lost.
For example, in Chaucer's time the word night was pronounced /nixt/; later the /x/ was lost and the /i/ was lengthened to /iː/ by compensatorylengthening.