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[RH] Third-party Punishment by Preverbal Infants

For millennia, philosophers have pondered the question of whether humans are inherently good. But now, researchers from Japan have found that young infants can make and act on moral judgments, shedding light on the origin of morality.

In a study recently published in Nature Human Behaviour, researchers revealed that 8-month-old infants can punish antisocial behavior exhibited by a third party. Thus, the motivation driving punishment would be intrinsic as opposed to learned.

Punishment of antisocial behavior is found only in humans and is universal across cultures. However, the development of moral behavior is not well understood. Further, it can be very difficult to examine decision-making and agency in infants, which the researchers at Osaka University aimed to address.

Morality is an important but mysterious part of what makes us human. The researchers wanted to know whether third-party punishment of antisocial others is present at a very young age, because this would help to signal whether morality is learned.

To tackle this problem, the researchers developed a new research paradigm. First, they familiarized infants with a computer system in which animations were displayed on a screen. The infants could control the actions on the screen using a gaze-tracking system such that looking at an object for a sufficient period of time led to the destruction of the object. The researchers then showed a video in which one geometric agent appeared to ¡°hurt¡± another geometric agent and watched whether the infants ¡°punished¡± the antisocial geometric agent by gazing at it.

The results were surprising. The researchers found that preverbal infants chose to punish the antisocial aggressor by increasing their gaze towards the aggressor. 

To verify their findings, the researchers conducted three control experiments to exclude alternative interpretations of the infants¡¯ gazing behaviors.

The observation of this behavior in very young children indicates that it is an inherent element of human cooperation.

- NATURE HUMAN BEHAVIOUR, June 9, 2022, ¡°Third-party punishment by preverbal infants,¡± by Yasuhiro Kanakogi, Michiko Miyazaki, Hideyuki Takahashi, Hiroki Yamamoto, Tessei Kobayashi, Kazuo Hiraki. © 2022 Springer Nature Limited. All rights reserved.

To view or purchase this article, please visit
https://www.nature.com/articles/s41562022-01354-2





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- NATURE HUMAN BEHAVIOUR, June 9, 2022, ¡°Third-party punishment by preverbal infants,¡± by Yasuhiro Kanakogi, Michiko Miyazaki, Hideyuki Takahashi, Hiroki Yamamoto, Tessei Kobayashi, Kazuo Hiraki. © 2022 Springer Nature Limited. All rights reserved.

To view or purchase this article, please visit
https://www.nature.com/articles/s41562022-01354-2