The master's thesis reveals the crediblity of information on the topi cof cancer in the online health community Med.Over.Net. It focuses on the credibility of informational social suport, which is exchanged between users of online health community. The credibility of informational social support consists of several dimensions, namely: accuracy, completeness, readability/comprehensibility and trust. On the based rewiev of the literature, on the credibility of online (health) information, and informational social support based on the coding scheme a quantitative analysis of content was preformed. The aim is to determine objective credibility of informational social support in online health community, and whether there are differences between the credibility of informational social support according the author of the message. The data was prepared and collected in collaboration with the Center for Methodology and Informatics within the project Traps and Opportunities of Online Health Communities. The unit of analysis is an informational support message from the MedOverNet website for the period 2015-2019. The reliability of the coding was assessed, and the reserach questions were addressed with the factor analysis and methods for verifying the assumptions about equality of means. It turned out that the objective informational social support in the online health community Med.Over.Net is high and that there are statistically significant differences between all dimensions of the crediblity of the information social support. A statistically significant difference between the messages published by moderators and ordinary users is present in only one dimension of information social support, namely in the dimension of accuracy.
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