Sentence-final particles imply whether a message-sender's statement succeeds its antecedent situation or the sender commits to start a new situation, and temp message-receivers to join communicative interaction with the sender. This study investigated effects of this function on message-receivers in three experiments in use of sentence-final particle “no” which maintains vague relation between the sender's present statement and its antecedent situation. In experiment 1 the effect of adding “no” on declarative sentences upon impression of the passage-writer was examined. In experiment 2 the effect of “no” upon perception of the writer's intention for interactive discourse was examined. In experiment 3 the effect of “no” upon readers' sense of involvement in the sender's discourse. The material was sentences about behavior in a day of an undergraduate girl,The materials were two versions of a diary -- like prose of a serious campus girl, one of which was composed of declarative sentences and the other was composed of every declarative sentence plus sentence-final particle “no”. The experiments showed the predicted results, that is, the writer was recognized to be less logical when she used sentences with the “no”, and the readers perceived the writer's expectation for readers' participation and sensed involvement in the writer's discourse. A message sender can influence on receivers' impression, behavior, and attitude by making selective use of sentence-final particles. In this sense, strategic use of sentence-final particles is one of rhetoric to control on building interaction with message receivers.
