Prosodic morphology is the study of how morphological and phonological factors relate and influence grammatical systems. Key areas of research include how prosodic structure affects templatic and circumscriptional morphology such as reduplication and infixation. The principles of prosodic morphology include template satisfaction, prosodic circumscription, and the prosodic morphology hypothesis. Reduplication examples provided are the repetition of sounds like "ding-dong" or suggesting alternative movements like "flip-flop".