Causatives have been subjected to intensive scrutiny by linguists in recent years. Cross-linguistic studies suggest that the formation of causatives reflects the real world perception of cause-result relations, though some studies contradict this finding. The aim of this study is to explore the underlying principles that determine the way an event is encoded linguistically in Saisiyat, a Formosan language. Following Croft's model of idealized single events, we promote the study of causatives to the discourse level. The results show that the iconicity of language is reflected in the ordering of linguistic elements as well as their grammatical integrity.