公開親密行為 (Public Displays of Affection), 定義為在公開場合的情感展現 (Miller, 2013)；行為的展現包括從相對溫和的行為，如牽手；到更強烈的行為，如親吻。隨著科技的發展, 公開親密行為也從原來的現實生活中的展現，擴展到在社交媒體上的親密互動 - 網路親密行為。因此，本研究將探討網路社交平台與真實生活中的公開親密互動。再者，動機是驅動行為的關鍵，而在親密關係中，公開親密動機是影響公開親密行為的重要原因，故本研究將進一步以調節焦點理論 (Higgins, 1997) 的促進型焦點 (Promotion Focus) 與預防型焦點 (Prevention Focus) ，探討情侶在公開親密促進感情動機與減少威脅動機，釐清公開親密行為的作用。過去的親密行為研究中，都以親密行為對情侶愛情滿意的影響為研究關鍵；但愛情關係的滿意程度是一個雙向歷程，會被親密他人的行為所影響，包括對方所展現的公開親密行為。所以本研究欲探討情侶的愛情滿意與公開親密行為的關係，在公開親密動機與行為間是否具有調節作用。因此，本研究目的如下：探討 (1) 公開親密動機與公開親密行為間的關聯性。(2) 釐清情侶的愛情滿意和公開親密行為的關係。(3) 情侶的愛情滿意在公開親密動機與公開親密行為間關係的調節作用。(4) 了解公開親密行為與愛情滿意的發展。
本研究以台灣大學生及其情侶為研究對象；研究一以100位大學生（50對異性戀情侶）為研究參與者，結果發現公開親密促進感情動機與公開親密行為之一般場合、熟人場合及網路親密行為間皆具有正向關聯；但在公開親密減少威脅動機中則無顯著的關聯。研究二以·82位大學生（41對異性戀情侶）為研究參與者，結果發現愛情關係之互動滿意在熟人場合親密行為間有正向關聯；說明情侶的互動滿意越高，在熟人場合親密行為越高。但在一般場合及網路公開親密行為則無顯關聯。研究進一步探討發現 (1) 互動滿意在減少威脅動機與網路親密行為間具有負向調節效果。(2) 情愛滿意在促進感情動機與網路親密行為間具有正向調節效果；(3) 情愛滿意在減少威脅動機與網路親密行為間則有負向調節效果。最後，根據本研究之結果進行討論，並針對研究貢獻、限制與未來方向加以闡述。

Public displays of affection (PDAs) are acts of physical intimacy that can be seen by others. PDAs have also expanded from real-life to social media. This study will investigate PDAs online and in real life (general and acquaintance occasion).
Motivation is the key driver for behavior, As we hypothesized that, (1) motivation is the important cause for the behavior of PDAs. In-depth, we clarified motivation in promoting motivation and prevention motivation. Relationship satisfaction is a two-way process that is influenced by the behavior of others, including PDAs displayed by the other half. Therefore, (2) this study investigate the relationship between couple's love satisfaction and PDAs, and the moderating effect between PDA’s motivation and behavior. Study also focus on the long-term effect of PDAs on love satisfaction.
In Study 1, by analyzing data from 100 heterosexual couples (50 pairs), we found a positive association between PDAs promoting motivation and behavior in PDAs in general, acquaintance occasion, and online; but no significant association was found in PDAs prevention motivation. In Study 2 of 82 heterosexual couples (41 pairs), results show that there was a positive relationship between couples’ interaction satisfaction and PDAs behavior in acquaintance. However, no significant association was found between PDAs behavior in general and online. Lastly, study found that (1) Interaction satisfaction had a negative moderating effect between prevention motivation and online PDAs. (2) Love satisfaction has a positive moderating effect between promoting motivation and online PDAs; (3) Love satisfaction has a negative moderating effect between prevention motivation and online PDAs. Finally, the results of this study are discussed.

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