Differentiating "could" from "should": Developmental changes in modal cognition.

Area of Science:

• Cognitive Development
• Developmental Psychology
• Modal Cognition

Background:

• Young children often confuse events violating physical laws with mere physical regularities.
• Similarly, children conflate violations of moral laws with social regularities.
• These difficulties suggest potential issues in early modal cognition.

Purpose of the Study:

• To investigate if difficulties in distinguishing physical and moral violations stem from a general deficit in modal cognition.
• To explore how children aged 3-10 and adults reason about possibility and permissibility.
• To determine if young children can differentiate between 'could happen' and 'should happen' scenarios.

Main Methods:

• Participants (children aged 3-10 and adults) were presented with impossible, improbable, unconventional, and immoral events.
• Judgments were collected on whether events could occur in real life and if they were permissible.
• A second study assessed whether events required magic (impossibility) or punishment (impermissibility).

Main Results:

• Preschoolers struggled to distinguish law-violating from regularity-violating events.
• Children also confused the two modal questions, deeming physical anomalies immoral and social anomalies impossible.
• Findings were consistent across two studies, indicating a developmental lag in distinguishing types of abnormality.

Conclusions:

• Young children's understanding of abnormal events is not yet differentiated.
• The ability to distinguish between possibility ('could') and permissibility ('should') develops over time.
• Learning to differentiate between different categories of abnormal events is a key developmental milestone.