
Nullius in Verba Episode 74: Notiones Vague
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Jan 30, 2026 They dig into problems caused by vague concepts in psychological science, including the jingle‑jangle fallacy and conceptual stretching. They debate umbrella constructs, whether to build centralized repositories of definitions, and how academic incentives favor catchy but fuzzy labels. Philosophical analysis, experimental tests, and proposals for a PsyCore repository get discussed as ways to sharpen concepts.
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Language Drives Conceptual Confusion
- The jingle-jangle fallacy shows language causes conceptual confusion by using same or different words for different things.
- Smriti Mehta and Daniël Lakens trace this confusion back to early 20th-century logic and semantics.
Ambiguity ≠ Vagueness
- Ambiguity and vagueness are distinct problems for constructs: ambiguity allows discrete meanings, vagueness is fuzzy boundaries.
- Resolving ambiguity is often simpler than fixing vagueness which affects measurement and interpretation.
Value-Laden Versus Scientific Constructs
- Some constructs are value-laden (e.g., organizational effectiveness) and lack a single 'true' definition.
- Researchers may choose definitions that reflect values or goals, not objective truth.



