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Problem-Solving Before Instruction PS-I: A Protocol for Assessment and Intervention in Students with Different Abilities

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The Online Misinformation Susceptibility Scale: Development and Initial Validation.

Aglaia Katsiroumpa¹, Ioannis Moisoglou², Polyxeni Mangoulia¹

¹Clinical Epidemiology Laboratory, Faculty of Nursing, National and Kapodistrian University of Athens, 11527 Athens, Greece.

Healthcare (Basel, Switzerland)

|September 13, 2025

Summary

This summary is machine-generated.

Researchers developed the Online Misinformation Susceptibility Scale (OMISS) to measure how easily individuals believe false information online. This validated tool helps identify those vulnerable to online misinformation, aiding targeted interventions.

Keywords:

development fake news misinformation questionnaire scale social media susceptibility tool validation websites

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Area of Science:

Psychology
Information Science
Public Health

Background:

Widespread online misinformation poses significant societal risks.
Existing tools to measure susceptibility to online misinformation are lacking.
Developing a reliable scale is crucial for understanding and mitigating misinformation impact.

Purpose of the Study:

To develop and validate the Online Misinformation Susceptibility Scale (OMISS).
To create a psychometrically sound instrument for assessing vulnerability to online misinformation.

Main Methods:

Literature review for item generation and expert content validation.
Cognitive interviews for face validity and factor analyses for construct validity.
Concurrent validity assessed against fake news detection, trust, and conspiracy belief scales; reliability analyzed using Cronbach's alpha, McDonald's Omega, and ICC.

Main Results:

Exploratory and confirmatory factor analyses supported a nine-item, one-factor OMISS model.
OMISS demonstrated strong concurrent validity with significant correlations across multiple scales.
High reliability indicated by Cronbach's alpha (0.920), McDonald's Omega (0.921), and ICC (0.994).

Conclusions:

The OMISS is a psychometrically validated tool for measuring online misinformation susceptibility.
OMISS can effectively identify individuals at higher risk of believing misinformation.
Findings support the use of OMISS by policymakers, educators, and healthcare professionals to target interventions.