Children assess informant reliability using bystanders' non-verbal cues

Area of Science:

• Cognitive Development
• Social Psychology
• Child Psychology

Background:

• Preschool children selectively choose informants based on past accuracy.
• Children evaluate informant trustworthiness using historical data.

Purpose of the Study:

• To investigate if preschoolers use bystander non-verbal cues (assent/dissent) to assess informant trustworthiness.
• To determine if children's trust in an informant persists after bystander cues are removed.

Main Methods:

• Four-year-olds observed two informants making conflicting claims about unfamiliar objects.
• Bystanders signaled assent (nods, smiles) or dissent (head shakes, frowns) toward informants' claims.
• Children's endorsement of claims was recorded, followed by trials without bystanders.

Main Results:

• Children predominantly agreed with the informant who received bystander assent.
• This preference persisted in subsequent trials even when bystanders were absent.
• Children with advanced theory of mind showed greater trust in the previously endorsed informant.

Conclusions:

• Preschoolers utilize third-party non-verbal signals to evaluate informant accuracy when lacking background knowledge.
• Social cues from bystanders significantly influence children's trust in informants.
• The impact of observed social endorsements on trust is durable and linked to mental state understanding.