Causal essentialism in kinds.

Area of Science:

• Cognitive Psychology
• Philosophy of Science
• Concept Formation

Background:

• Psychological essentialism posits that people attribute underlying essences to categories.
• Causal essentialism specifically suggests these essences are necessary, sufficient, and explanatory for category membership and features.

Purpose of the Study:

• To investigate whether causal essentialism is applied differentially to natural kinds versus arbitrary categories.
• To determine if the belief in underlying essences influences generalization patterns.

Main Methods:

• Four experiments were conducted to test beliefs about category essences and generalization.
• Participants evaluated categories based on natural kinds (e.g., animals) and arbitrary criteria (e.g., man-made groupings).
• Generalization of causal properties was assessed for members of both kinds and arbitrary categories.

Main Results:

• Overt endorsement of causal essences was higher for non-arbitrary kinds compared to arbitrary categories.
• Participants were more likely to generalize causal relations (or lack thereof) for members of natural kinds.
• These effects were observed across diverse domains, including living things and artifacts.

Conclusions:

• Causal essentialism is more pronounced for categories perceived as natural kinds than for arbitrary categories.
• This distinction impacts how individuals understand category membership and infer properties.
• Findings have implications for understanding how people conceptualize categories, including mental disorders treated as kinds.