27 July 2017

Quartz: People have an irrational need to complete “sets” of things

New research reveals that people are irrationally but effectively motivated by the idea of completing a set, even if it means working harder or spending more money—with no additional reward other than the satisfaction of completion and the relief of avoiding an incomplete set. Imagine arriving at your boss’s summer BBQ and presenting her with five beers in a box designed to hold six. No matter that your favorite craft beer store permits you buy bottles one at a time. Chances are you’d still buy six, just to fill all six spaces in the box. [...]

The results of the field study were stark. Among those who chose to give gifts, 21 percent of those in the “Global Survival Kit” condition chose to donate all six items, compared with just 5 percent in the “gift” condition and 3 percent in the cash condition.

“The strength of the increase was a really nice surprise,” says Doug Wayne, director of national digital marketing and web strategy at the Canadian Red Cross, who decided to collaborate with the research team after meeting Norton through a colleague. “Ultimately, it speaks to how powerful that framing is.” [...]

“People persist with completing pseudo-sets even when it’s costly for them to do so,” John says. “That, to me, is especially compelling as a researcher—that completing this totally arbitrary set is so motivating to people that they are willing to participate in an obviously bad bet.”

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