期待感，在消費心理學領域已被看重成影響消費品質的因素之一，然而在互動設計領域中只有被簡單定義而已。同時，當訊息傳遞被視為一個經驗為中心的設計議題時，其在人類溝通中不僅是傳遞者的意圖，更是雙方期待交錯構成。因此本研究以情感溝通為題，透過緩慢科技的概念，除了試圖在訊息傳遞中創造期待、重拾人與人之間溝通型態的反思、探索訊息傳遞事件在時間和空間兩者間可能的穿梭、交換或對比所帶來的互動體驗可能性之外，更希望能夠從中深入理解期待感。

研究過程中使用Research through Design(RtD)方法，以質性經驗為主，數據資料為輔，分有三個階段：
1. 為了找出設計機會，前測(pre-test)利用設計探針去了解使用者對於情感表達和非即時訊息的感受，並檢視與整理結果後發掘新的傳遞可能；
2. 概念重整後設計了一套非即時傳遞方式CrescendoMessage，對比於目前慢訊息中只有延遲的慢，Crescendo擁有在一段時間中逐漸展現訊息的特性。以Wizard of Oz方式向第一批受測者做模擬實驗，獲得初步的檢驗成果；
3. 基於前面實驗的探索與發現，Crescendo所帶來的經驗被重新視為一種引發期待的訊息方式。最後一個實驗藉由開發iOS手機程式去杜絕實驗者介入談話的干擾可能性，用Mobile Analytics的客觀數據做經驗分析及訪談。

研究貢獻是從消費心理學領域引入期待感到互動設計領域作為一個經驗品質，找到比前人對期待感的理解更為精細的定義與概念模型。以這樣的期待感定義與模型特徵，希望日後能夠幫助互動設計師構思經驗設計的概念與機會。研究過程中，受測者亦體驗到漸強訊息對反思溝通的質量與影響，其實驗結果也開拓了另類的情感溝通經驗。未來期許有更多的設計作品能夠應用期待感去塑造人類更豐富的感知經驗。

Anticipation has been one of the essence of consume quality in consumer psychology field. However, it merely has a brief definition in interaction design field. Meanwhile, messaging in human communication is not only a carrier of the sender’s intention but also interplay between anticipations on both sides if we see it as an experience-centered design issue. Therefore, this research follows the slow technology concept and targets at emotional expression. We attempt to create anticipation and reflection in communication, explore the experiential possibilities in messaging, and most important of all, this work aims at having a better understanding of anticipation.

The whole working process was done with Research through Design (RtD) method. All the three stages below emphasize qualitative experiences while the quantitative data are only for helping researchers to analyze the non-instant messaging experiences of participants:
1. To find design opportunities, we put design probing into practice and found out an emotional expression problem, and their felt experience towards non-instant messaging. After that, the result was analyzed, and it primed the new possibilities of the initial design.
2. As a result, we made a prototype of our preliminary concepts aiming to articulate new idea, crescendo expression. In contrast to using only delayed expression for slowness, this research introduces crescendo expression of slowness that might be thought of as a temporally gradational exposure of a message over a period of time. The CrescendoMessage, an interactive prototype built on Wizard of Oz method, was implemented and a user study was conducted for investigating the felt experiences with crescendo expression on digital photos in young adults’ daily messaging practices.
3. With the findings and insights, we reframed crescendo messaging experience as a way of evoking anticipation, which is an actively sense-making process in a dialog provoked by perceived information drawbacks of interchanged messages. The last experiment is done by an iOS mobile app to eliminate the interrupt possibilities and mobile analytics to collect objective user behavior data.

The contribution of this research is to introduce anticipation from consume psychology field to interaction design field as an experiential quality. A more precise definition and concept model are presented for the following designers to figure out further design opportunities in experience design. Besides, during the experiments, participants experienced the reflective quality and influence of CrescendoMessage. Their experimental outcomes also paid off and created another emotional expressing way. The ultimate anticipation of this research is to see how anticipation can do to enrich people’s felt experiences in the future.

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