IQ and Incentives

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Via Tyler Cowen, this is a genuinely startling result:

….material incentives in random-assignment studies increased IQ scores by an average of 0.64 SD, suggesting that test motivation can deviate substantially from maximal under low-stakes research conditions. The effect of incentives was moderated by IQ score: Incentives increased IQ scores by 0.96 SD among individuals with below-average IQs at baseline and by only 0.26 SD among individuals with above-average IQs at baseline.

Let me translate this into English. On IQ tests, a single standard deviation equals 15 points. So if this research is right, giving people actual incentives to do well on IQ tests (money, for example) has the following effect:

  • Those with low IQs scored 14 points higher.
  • Those with high IQs scored 4 points higher.

In other words, giving people an incentive to do well collapsed the gap between high and low by ten points — and bigger incentives created even bigger effects. These results are based on a meta-analysis of previous studies, not on new research, and metastudies are notoriously tricky to do properly. So take this with the usual grain of salt until these results get replicated elsewhere.

But ten points is a helluva lot. If this holds up, it’s pretty significant.

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

Truth #4: When we go to work, we're in the fight.

Truth #5: It's about minority rule.

Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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