How does iambic tetrameter appear in English and Scottish traditional ballads?

In English and Scottish traditional ballads, iambic tetrameter is a fundamental component of the ballad stanza, which typically consists of four-line quatrains. These stanzas are characterized by an alternating structure of iambic tetrameter (four metrical feet) and iambic trimeter (three metrical feet), with the second and fourth lines usually rhyming.1234

While the meter is described as alternating between four and three stresses, musical analysis reveals that the three-stress lines often conclude with an implied fourth stress to align with the pauses in the musical phrase. This rhythmic structure is well-suited to the cadence of the English language, making iambic rhythms, particularly tetrameter and pentameter, the preeminent meters in English verse.32

The use of this meter, combined with techniques like refrains and incremental repetition, supports the oral performance and mnemonic requirements of traditional ballads, ensuring the narrative remains accessible to the listener.3