Organizations can raise the probability that an individual will appear at a meeting or event by switching from saying at the end of a reminder phone call, “We’ll mark you on the list as coming then. Thank you!” to “We’ll mark you on the list as coming then, okay? [Pause for confirmation.] Thank you.” One blood services organization that made this tiny, commitment-inducing wording change increased the participation of likely donors in a blood drive from 70 percent to 82.4 percent.85
