Web Form Design: Filling in the Blanks by Luke Wroblewski Rosenfeld Media, 2008; version 1.0
The advantage of both these options is that they require one less explicit question for people to answer. However, the second option has the added advantage of not complicating the primary call to action. Consider the difference between “Buy Now” and “Agree & Buy Now.” One is clearly more directly aligned with people’s goals of buying a product than the other. Best Practices • Avoid secondary actions on forms whenever possible. Provide people with a single path to completion. • If secondary actions are required, ensure that there is a clear visual distinction between the primary and secondary actions. • When you are distributing the questions in a form across multiple Web pages, primary actions move people closer to completion and secondary actions allow them to go back.
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