The “Online Misinformation Susceptibility Scale” (OMISS) is a valid, short and easy-to-use tool that measures online misinformation susceptibility. We are now providing a brief and valid self-assessment tool at no cost to assess levels of online misinformation susceptibility in the general population.

The “Online Misinformation Susceptibility Scale” is provided at no cost for noncommercial educational and research purposes. You have my permission for free noncommercial research/teaching use of the “Online Misinformation Susceptibility Scale”.

A condition for free use of the “Online Misinformation Susceptibility Scale” is that you cite the following publication:

Katsiroumpa, A., Moisoglou, I., Mangoulia, P., Konstantakopoulou, O., Gallos, P., Tsiachri, M., & Galanis, P. (2025). The Online Misinformation Susceptibility Scale: Development and Initial Validation. Healthcare, 13(17), 2252. https://doi.org/10.3390/healthcare13172252

You are welcome to translate the “Online Misinformation Susceptibility Scale” into another language if you agree to send me a copy of the translation. Word files (.doc or .docx) are the best option. Be sure to include the copyright statement on the translated version, as well as credit the person who did the translation and the year.

Cut-off point

A suggested cut-off point for the OMISS is 23. Participants with OMISS score ≥23 experienced high levels of misinformation susceptibility.

Please cite the following publication if you use the cut-off point for the “Online Misinformation Susceptibility Scale”:

Katsiroumpa, A., Moisoglou, I., Gallos, P., Galani O., Tsiachri, M., Lamprakopoulou, K., & Galanis, P. (2025). Online Misinformation Susceptibility Scale: Determination of an optimal cut-off point. International Journal of Caring Sciences, Under press