What roles does a scientific journals play in research?

Answer 1

There are various reasons to use scientific journals.

One is that it can be the basis of research. The research may have been done to either support or falsify specific hypothesis introduced by scientific journal(s). It can also support or falsify the findings of scientific journal(s).

Another reason to use scientific journals is the other way around. Scientific journals can be used to support or falsify research findings.

The main point is: scientific journals presents ideas and findings. Because hypothesis are deemed "plausible" until proven false, a research is somehow useless if scientific journals that only support the research findings are included. Findings that contradict the research data must be included. If not, then at least, the audience knows that there was either not enough information to contradict the research or the research findings are partly "true." Moreover, scientific journals tell the audience "on what basis did the researchers conducted their research on." Is there enough credibility? (Background) Information? etc.