Research has shown that one of the least-effective persuasive devices in appeal letters is a postscript at the end.

Name: Research has shown that one of the least-effective persuasive devices in appeal letters is a postscript at the end.
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Question

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Research has actually shown that using a postscript, or a P.S., at the end of an appeal letter can increase the effectiveness of the letter. The P.S can serve as a final reminder or call to action for the recipient.

Research Has Shown That One of the Least-Effective Persuasive Devices