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  • https://doi.org/10.11606/s1518-8787.2026060007015Copy DOI Icon

Guttman error graphs: a visual approach to scalability analysis

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Abstract

ABSTRACTOBJECTIVE To develop an innovative graphical tool to represent Guttman errors and facilitate scalability analysis of measurement instruments in epidemiology.METHODS Implemented in R (RStudio), the guttemap function was developed to fill this gap. It provides an intuitive visual representation of Guttman errors, with color gradients that facilitate the assessment of measurement instruments, revealing internal patterns of inconsistency. The rationale underlying the proposed Guttman error map is presented, along with an annotated summary of the routine for its implementation.RESULTS Seven synthetic examples show the potential of graphical representation in identifying problem areas and how this helps to inform adjustments and develop more robust instruments.CONCLUSIONS With guttemap, Guttman error analysis becomes more accessible and interpretable, contributing to the improvement of measurement instruments and the advancement of epidemiological research.

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