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What Happens to Group Behavior When One Person Breaks the Rules?

Six sourced studies on how one rule-breaker changes everyone else, from a graffiti experiment that doubled littering and theft to the single dissenter who cut conformity by 80%

What Happens to Group Behavior When One Person Breaks the Rules? | DT Linux Data Briefing
A DATA BRIEFING FROM DT LINUX · INTERACTIVE DASHBOARD

What Happens to Group Behavior When One Person Breaks the Rules?

Six sourced studies on how one rule-breaker changes everyone else, from a graffiti experiment that doubled littering and theft to the single dissenter who cut conformity by 80%. Filter the charts below by case.
Published October 6, 2026 · DT Linux Data Store
69%
littered next to a wall that already had graffiti on it, versus 33% next to a clean one
24.3%
claimed an impossible perfect score after an in-group peer cheated, versus 3.6% after an outsider did
91%
group contribution rate once free-riders could be punished, up from 16% with no punishment option
80%
relative drop in conformity to a wrong majority, once a single dissenter spoke up first

Three tiers, by what they actually measure

TIER 1

The Spread

One visible rule violation signals that breaking the rules is normal, safe, or already underway, so others follow.

TIER 2

The Spiral

Once that permission takes hold, group cooperation can collapse fast, and the right intervention can reverse it just as fast.

TIER 3

The Split

The group's response isn't uniform. Who broke the rule, and what they broke, changes whether the group punishes, imitates, or is freed by it.

Explore the data

Filter every chart below by case. Charts that don't include the selected case dim out rather than disappear, so you can always see the full picture.

With disorder already visible nearby, how many people littered anyway?

Keizer, Lindenberg & Steg, Science, 2008. Groningen field experiment, disorder (graffiti) condition only.

Dataset schema

The structure behind every figure in this dashboard, available as a licensed dataset or API feed.
FieldTypeDescription
case_idstringShort identifier for the case, e.g. aschally
case_namestringFull, human-readable case title
tierstringspread, spiral, or split
metric_labelstringWhat the figure measures
metric_valuenumberThe reported numeric value
unitstringpercent or cm
sourcestringStudy, institution, or database
source_yearnumberYear of fieldwork or publication
sample_sizestringReported sample size, where available

Sourcing & methodology

Every figure traces to a named peer-reviewed study, a named natural experiment, or a named public dataset, never a repeated internet statistic. The Split tier is included specifically because it complicates a simple "rule-breaking is contagious" story, and that complication is documented rather than smoothed over.

Licensing & compliance

This dataset is available for commercial and internal use under a DT Linux data license. Every figure remains attributed to its original source. No respondent-level or personally identifiable data is included anywhere; all figures are published aggregates.

API access

Need these figures inside your own dashboard or product? DT Linux can expose this and other data-briefing datasets over a lightweight API. Reach out at info@dtlinux.com to discuss access.

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