重複效果常被運用於廣告及社會行銷的策略工具，然而它不僅需要強烈的理論支持，同時也需要實務上的操作運用。因此，本研究以計畫行為理論為基礎來探討重複訊息之影響效果。本實驗是針對一個回收訊息對同樣消費者進行三種程度的訊息暴露，結果發現，重複效果對態度、客觀的規範、知覺的行為控制以及行為意圖都會造成改變，此研究資料分析，也充分顯示重複訊息在溝通效果上具有理論和實務的重要性。

Repetition effect as a commercial marketing tool has been applied much in
advertising and also in social marketing. However, repetition effects are not merely based on sound theories but also related to a number of important researches and practical operations. Therefore, this paper pays more attention on the effects of repetition message from the basis of Planned Behavior Theory. An experiment is conducted where these effects are examined at three levels of message exposure. As a result, repetition effect always causes changes wherever in attitude, subjective norm, perceived behavioral control, and behavioral intention. Given the analysis of data obtained, the findings from this conceptual perspective in examining repetitive communicating of message effectiveness significantly highlight this issue of both practical and theoretical importance.