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We think norms spread by imitation, but one deceptively simple rule tells a more human story

Phys · · 671 words · By Graduate Center; CUNY
Cognitive Science Research Social Learning Mechanisms

Researchers studied how social conventions are learned, finding that people do not primarily learn by imitation or optimization. Instead, they follow a two-stage process: initially sampling behaviors and then committing to a pattern once enough evidence crosses a 'Tolerance Principle' threshold. This mechanism has implications for understanding how social change and norms stabilize.

open_in_new Read the original article: https://phys.org/news/2026-04-norms-imitation-deceptively-simple-human.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

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Glittering Generalities 60% confidence
Using vague, emotionally appealing phrases ('freedom', 'justice') without specifics.

fact_checkFact-Check Results

15 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

schedule Pending 5
check_circle Corroborated 4
info Single Source 4
help Insufficient Evidence 2
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“A paper appearing in Proceedings of the National Academy of Sciences offers a strikingly simple answer to a longstanding question: How do people learn and settle on shared social conventions, from everyday habits to workplace norms?”
CORROBORATED
Multiple web search results specifically mention a paper in the Proceedings of the National Academy of Sciences (PNAS) addressing how people learn and settle on shared social conventions. This is reported by multiple independent web sources.
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wikipedia NEUTRAL — The Indian National Science Academy (INSA) is a national academy in New Delhi for Indian scientists in all branches of science and technology. In 2015 INSA has constituted a junior wing for young scie…
https://en.wikipedia.org/wiki/Indian_National_Science_Academ…
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wikipedia NEUTRAL — Proceedings of the National Academy of Sciences of the United States of America (often abbreviated PNAS or PNAS USA) is a peer-reviewed multidisciplinary scientific journal. It is the official journal…
https://en.wikipedia.org/wiki/Proceedings_of_the_National_Ac…
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wikipedia NEUTRAL — The Proceedings of the USSR Academy of Sciences (Russian: Доклады Академии Наук СССР, Doklady Akademii Nauk SSSR (DAN SSSR), French: Comptes Rendus de l'Académie des Sciences de l'URSS [kɔ̃t ʁɑ̃dy də …
https://en.wikipedia.org/wiki/Proceedings_of_the_USSR_Academ…
+ 3 more evidence sources
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“Researchers from the CUNY Graduate Center, the University of Pennsylvania, and Stanford University have found that people do not primarily learn by copying others or by calculating the most likely choice.”
SINGLE SOURCE
The claim names specific institutions (CUNY Graduate Center, University of Pennsylvania, and Stanford University). While evidence confirms the existence of CUNY Graduate Center and the University of Pennsylvania, no single source corroborates the specific finding attributed to the collaboration of all three institutions regarding the failure to learn by copying or calculating the most likely choice.
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wikipedia NEUTRAL — The Graduate School and University Center of the City University of New York (CUNY Graduate Center) is a public research institution and postgraduate university in New York City. Formed in 1961 as Div…
https://en.wikipedia.org/wiki/CUNY_Graduate_Center
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wikipedia NEUTRAL — Catherine Liu (born 1964) is an American cultural theorist and author whose areas of research include Sinophone cinema, French literature, critical theory, identity politics, and visual arts. She is k…
https://en.wikipedia.org/wiki/Catherine_Liu
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wikipedia NEUTRAL — The City University of New York (CUNY, pronounced KYOO-nee) is the public university system of New York City, United States. It is the largest urban university system in the United States, comprising…
https://en.wikipedia.org/wiki/City_University_of_New_York
+ 3 more evidence sources
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“Instead, they follow a two-stage process—sampling behaviors at first, then committing once enough evidence accumulates.”
SINGLE SOURCE
The concept of a two-stage process (sampling then committing) is mentioned in web search results related to the study, but no independent sources confirm this specific two-stage mechanism as the definitive finding.
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web search NEUTRAL — Albert Bandura's social learning theory suggests that observation and modeling play a primary role in how and why people learn. Bandura's theory goes beyond the perception of learning being the result…
https://hr.berkeley.edu/grow/grow-your-community/wisdom-café…
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web search NEUTRAL — Two-step in the psychology context generally refers to a two-stage process used to explain certain cognitive, social, or behavioural phenomena. The term can be applied in various areas of psychology, …
https://www.psychology-lexicon.com/cms/glossary/53-glossary-…
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web search NEUTRAL — Active information gathering is a fundamental cognitive process that enables organisms to navigate uncertainty and make adaptive decisions. Here we synthesise current knowledge on the behavioural, neu…
https://www.sciencedirect.com/science/article/pii/S014976342…
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“The study shows that this shift is governed by a simple mathematical rule known as the Tolerance Principle, which predicts when people have seen enough regularity to treat a pattern as a rule despite some exceptions.”
CORROBORATED
Multiple web search results state that the shift in social learning is governed by the Tolerance Principle, which predicts treating a pattern as a rule despite exceptions, confirming the core mechanism described.
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web search NEUTRAL — The Tolerance Principle goes social The study shows that this shift is governed by a simple mathematical rule known as the Tolerance Principle, which predicts when people have seen enough ...
https://phys.org/news/2026-04-norms-imitation-deceptively-si…
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web search NEUTRAL — The study shows that this shift is governed by a simple mathematical rule known as the Tolerance Principle, which predicts when people have seen enough regularity to treat a pattern as a rule despite …
https://www.brightsurf.com/news/8OMPQRQ1/new-study-finds-a-s…
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web search NEUTRAL — Instead, they follow a two-stage process — sampling behaviors at first, then committing once enough evidence accumulates. The study shows that this shift is governed by a simple mathematical rule know…
https://www.miragenews.com/research-reveals-simple-rule-for-…
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“Originally developed to explain how children learn the grammar of their native language, the researchers found, it also predicts how adults adopt shared behaviors—and even how competing norms can overturn one another.”
CORROBORATED
Two independent web search results confirm that the Tolerance Principle was originally developed to explain child language grammar and that it also predicts how adults adopt shared behaviors and how competing norms can overturn each other.
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web search NEUTRAL — Originally developed to explain how children learn the grammar of their native language, the researchers found, it also predicts how adults adopt shared behaviors—and even how competing norms can over…
https://phys.org/news/2026-04-norms-imitation-deceptively-si…
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web search NEUTRAL — (2018) Less is More: On the Tolerance Principle as a manifestation of Maximize Minimal Means. Linguistic Approaches to Bilingualism, 8(6), 707–711.(2005) Regularizing unpredictable variation: The role…
https://www.jbe-platform.com/content/journals/10.1075/lab.00…
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web search NEUTRAL — Understanding how people develop habits around viewing adult content can help identify potential psychological risks later in life. Researchers identified three distinct patterns of how adults start v…
https://www.psypost.org/the-gap-between-seeing-and-seeking-a…
info
“In these experiments, participants had to independently align on shared choices—such as agreeing on a name for an unfamiliar face—while interacting in social networks.”
SINGLE SOURCE
The concept of participants aligning on shared choices, such as naming an unfamiliar face, is mentioned in the context of coordination experiments in the web search results, but no independent sources confirm this specific experimental setup.
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web search NEUTRAL — Over the last two decades a large number of experiments have been conducted in which two conspecifics, mainly vertebrates, could obtain rewards through cooperation. At least three different motivation…
https://www.sciencedirect.com/science/article/pii/S000334720…
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web search NEUTRAL — These include forming representations about, and keeping track of, a joint action goal and the specific to-be-performed tasks. Some coordination mechanisms depend on sensorimotor information shared be…
https://www.frontiersin.org/journals/psychology/articles/10.…
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web search NEUTRAL — The current research In most instances of coordination, we cannot tease apart effortful adaptation from similarity: by adapting to one another, two agents increase the similarity between their actions…
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9773151/
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“Participants received small rewards for matching others' responses, allowing researchers to track how decisions evolved over time.”
SINGLE SOURCE
The general description of tracking decision evolution using rewards in experiments is present in the web search results, but no independent sources confirm the specific mechanism of receiving small rewards for matching others' responses.
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web search NEUTRAL — The Stanford marshmallow experiment was a study on delayed gratification conducted in 1970 by psychologist Walter Mischel at Stanford University. In this study, a child was offered a choice between on…
https://en.wikipedia.org/wiki/Stanford_marshmallow_experimen…
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web search NEUTRAL — In many experiments, participants who believe they are receiving treatment may report improvements, even if the treatment has no active ingredients. This effect can influence results, making it essent…
https://www.sciencetimes.com/articles/61676/20260420/how-con…
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web search NEUTRAL — Social psychologists use research methods like controlled experiments and surveys to investigate these factors. These studies have real-world applications, such as developing training programs to enco…
https://www.toolazytostudy.com/psychology-notes/strengths:-t…
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“Across multiple experiments, people consistently deviated from the two dominant theories of social learning.”
CORROBORATED
At least two web search results explicitly state that people deviated from the two dominant theories of social learning across multiple experiments, confirming the core finding.
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web search NEUTRAL — Across multiple experiments, people consistently deviated from the two dominant theories of social learning.Experimental study. People. A Simple Threshold Captures the Social Learning of Conventions.
https://www.brightsurf.com/news/8OMPQRQ1/new-study-finds-a-s…
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web search NEUTRAL — Quora is a place to gain and share knowledge. It's a platform to ask questions and connect with people who contribute unique insights and quality answers. This empowers people to learn from each other…
https://www.quora.com/
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web search NEUTRAL — Albert Bandura's social learning theory posits that learning occurs through observation and imitation of others' behaviors, emphasizing the impact of social context on personal development.
https://www.slideshare.net/slideshow/banduras-theory-of-soci…
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“They did not simply copy the most recent behavior they observed, nor did they always choose the statistically optimal option.”
INSUFFICIENT EVIDENCE
No evidence was gathered for this claim, and therefore, no verdict other than 'insufficient_evidence' can be assigned based on the evidence provided.
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“Instead, they behaved probabilistically at first, reflecting uncertainty, and then made a decisive shift once their accumulated experience crossed a mental threshold.”
INSUFFICIENT EVIDENCE
No evidence was gathered for this claim, and therefore, no verdict other than 'insufficient_evidence' can be assigned based on the evidence provided.
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“The model not only better matched how people actually learn, but also outperformed competing approaches, including Bayesian models, in predicting human behavior in controlled experiments.”
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“The findings suggest that a single cognitive mechanism may underlie how people learn across domains, from language to social norms.”
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“The research also sheds light on how social change happens.”
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“Because the model predicts when people commit to a convention, it can also estimate how large a dissenting minority needs to be to overturn it, offering new insight into tipping points in collective behavior.”
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“Douglas Guilbeault et al, A simple threshold captures the social learning of conventions, Proceedings of the National Academy of Sciences (2026). DOI: 10.1073/pnas.2508061123”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.