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Ontological confusion reconsidered: Introducing the new Ontological Confusion Scale
Ontological confusion refers to a cognitive error involving the misclassification of entities across distinct ontological domains—physical, biological, mental, and moral. While previous research links it to paranormal and pseudoscientific beliefs, existing measures—most notably the Core Knowledge Confusions (CKC) scale—suffer from conceptual ambiguity and cultural limitations. This paper introduces the Ontological Confusion Scale (OCS), designed to address these issues by evaluating seven types of ontological misclassification. Across two studies (N = 354 and N = 550), OCS demonstrates a robust unidimensional structure, high internal consistency, and strong convergent and discriminant validity. The scale predicts a range of unfounded beliefs, while outperforming CKC and belief in a just world in explaining unique variance. These findings support a broader view of ontological confusion as a general cognitive tendency underlying intuitive but erroneous reasoning across domains. OCS provides a reliable, culturally adaptable tool for research on belief formation and epistemic vulnerability.