Hi, I will like to design a loss-aversion survey. Here are the details:
In this part, you will be asked 13 questions. In each question, you will to asked to choose between two options, labeled A and B. Option A is always a sure outcome. Option B is displayed as a pie chart with the area of each pie slice corresponding to the likelihood (i.e., probability) of achieving some stated value. After answering 13 questions of this type, one of these questions will be randomly selected and used to determine your final payment for Part 2. Your payment will equal the outcome of the option you choose for this question times a conversion rate of 0.01. 
However, there is one extra rule for this survey: If you make a mistake in one of the first five questions, you can click the box on the bottom left corner of the screen to start this part over. This box will disappear once you proceed beyond the fifth question.

I would like to ask whether I can insert a button that once click it, then the player will start from Question 1 again and the data of their choices will update and overwrite previous data. I tried to have 13 fields (represent 13 questions) and 13 pages, each page contains one question, but I failed to set up this kind of button.

Can anyone give me some hints and suggestions? Thank you so much.

Hi Yang.
I don't think you can go back to a previous page in a given round. I think you have two possible solutions to your problem:
1. Your first 5 questions are on the same page and your button can be coded to reinitialize all 5 input fields. If this button is not clicked, you continue on the next page.
2. If you decide to have a question per page (as it seems to be your case), you may have multiple rounds. On the page associated with Question 5 (or a separate page just after this one), you may click on a button that will bring you to the first question in the next round. Then you only keep the last answers (the answers in the last round).
Best,
Rudy