預設選項是一個已經先設定的選擇，若是接受的一方沒有明確指出要做更改，就會自動接受到的選項，這樣的功用，可以被視為一種處理程序上必須被執行但選擇者沒有做選擇的預防機制。實驗一證實預設選項其中一個沒有被改的原因是根本不知道可以去改。由於規範焦點影響著人們的選擇，在實驗二中，我們加入規範焦點的因素並驗證預防焦點比起促進焦點較不會改變選項。最後一個實驗的資料驗證，廠商真心想要提供好的選擇給消費者時，可以透過在預設選項後方加註正面推薦等用語，能使該選項能夠有更高的被選擇率。

Default option is an option which is already set a choice for a decision maker. If the person doesn’t explicitly request for a different choice, he/she will receive this option automatically. This function could be regarded as a protection mechanism which occurs when the process must be executed but the chooser didn’t make any choices. In study 1, we demonstrate one of the reasons why default option effect occur is because choosers do not notice the default. In study 2, we investigate the impact of regulatory focus and prove that prevention focus prefer not to change the default option more than promotion focus. In the end, we show that if firm wants to offer consumers the better choice, they can add positive recommendation words to the default option, this can make the option be chosen with higher proportion.

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