Abstract
In the article we focus on the research of the eff ect of internet comments on pupils' expressing as well as the character of their following responses in the discussion. Th e research tool included an "online" scientifi c article with discussion comments, which appeared in four diff erent versions: A) positive comments supporting the main article's ideas, B) comments questioning or belittling the information of the article, C) negative comments expressing fear, D) insulting comments.
Th e results show diff erent pupils' expressions in the discussion in connection with the comments. The pupils' comments differ not only in the used language means, but also in the proportion of affi rmative or disagreeing replies or expressing the feeling of uncertainty.