What is the effect of the poetic form used in "The Raven"? The consistent length of each stanza makes the events in the poem predictable. The repeated final sounds in the last three lines of each stanza provides a familiar cadence to the poem. The use of regular meter in the lines of the poem helps create suspense. The refrain, set off on a single line by itself at the end of each stanza, strengthens the emphasis of those words.