Isochrony is the idea that a leid rhythmically divides time intae equal portions. Three types o diveesions are postulatit:
The idea wis first expressed bi Ken Pike in 1945. While mony linguists find the idea o different rhythm types appealin, empirical studies hae no been able tae fynd acoustic correlates o the postulatit types, cawin intae quaisten the validity o thir types.[1][2][3]