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Capuchin monkey fairness experiment

vladimerk1Cited 10× on HN, 2013–2026
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demo · general · evergreen · 2013–2026 on HN

A one-minute clip from Frans de Waal's TED talk showing two capuchin monkeys given unequal rewards (cucumber versus grape) for the same task. The monkey receiving the lesser reward reacts with protest.

HN uses it as shorthand for the innate human and primate sense of fairness in threads on pay, wealth and inequality.

10 comments from Hacker News

@maerF0x02026-04 · in “If America's So Rich, How'd It Get So Sad?”

I mean, it seems pretty obvious, no? Wealth is concentrated and can skew the averages, but happiness, even if rated on a scale, is not particularly able to skew the number up... so as wealthy americans got spectacularly rich, pulling up the "rich" side, maybe making them equisitely happy... a more widespread shift in sentiments are pulling down the average. And a lot of this makes sense... Wealth doesn't add much happiness over a certain threshold. A naive happiness maximizing algo would probably do something like cap someone around that number and redistribute the wealth to those below it. Plus there's the monkey grape/cucumber experiment - ▶ this video ... Humans are social status sensitive, meaning we're likely to have bad feelings (and make irrational choices) when we feel our place in the herd is falling or below someone else's. Eg: People living near lottery winners are more likely to go bankrupt than similar people who don’t have a winning neighbor, presumed to be a "keeping up with the joneses" kind of issue.

@sva_2024-02 · in “OpenAI Deal Lets Employees Sell Shares at $86B Valuation”

> the mere act of earning more money than someone else is a sin It is pretty universal among the animal kingdom ▶ this video

@kelseyfrog2023-12 · in “Billionaires amass more through inheritance than wealth creation, says UBS”

I'm always reminded of the video where one monkey is rewarded with a cucumber and one with a grape[1]. Certainly getting a cucumber is infinitely better than not having a cucumber, and yet the monkey protests. Despite having higher cognitive functions, that impulse still exists and can only be suppressed for so long and so far. No one has infinite capacity to maintain what they see as unfairness indefinitely, especially when it seems that humans make their own rules. 1. Capuchin monkey fairness experiment, total duration: 57s, ▶ this video

@maerF0x02022-02 · in “EU to mandate public salary information for all job postings [pdf]”

The only way I've seen this been well handled is to break out the value adding concepts to "bonuses" or add'l comp for details like: "we give people and extra $24k per year if they do oncall rotation" and we give "x% more to those who work more and contribute more" otherwise once it becomes public it turns into infighting of "we're both L3s, why do they get more?" (ignoring that one of them leaves early 2-3x a week to care for their child, or is a single worker with nothing better to do than contribute and thus does more than others) ... They're simple concepts, but hard to get people to be grown ups about. ▶ this video Also people psychologically overestimate their contributions and underestimate others... Has a lot of application in both the workplace and in intimate relationships.

@_tom_2021-12 · in “Toddlers are harsh judges of moral character”

It's not just children. Non human primates have notions of fairness, as demonstrated in this hilarious video. ▶ this video