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the claim

People are more likely to help when they are the only witness.

the verdict
INSUFFICIENT LEANING
Recorded sources
2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that people are more likely to help when they are the only witness?

Unclear. Two sources describe the bystander effect: a Wikipedia summary citing a 1969 experiment where 70% of lone witnesses helped versus 40% paired with a stranger, and a book chapter stating that the more witnesses present, the less likely anyone helps. Both support the claim only in general or single-experiment terms.

Verdict: PARTIAL LEAN · 2 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 2
Bystander effect - Wikipedia
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Bystander effect - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Bystander_effect

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More for · 1
Failing Fast
2017
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Failing Fast. (2017). doi.org. https://doi.org/10.1007/978-3-319-63318-3_2

Receipt History
held for human review18 Oct 2026
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