Publications which include articles written by experts in their field of study. After conducting experiments & reviewing other literature on the topic, they submit their article to a scholarly journal, which is then reviewed intensly by a group of experts who determine whether the article can be published. This process can take up to two years.
Nothing! All three are just different names for scholarly journals.
Ask these questions when reviewing an article:
Does it have an an abstract, or summary, of the article?
Are Footnotes/References included?
Does the journal it's published in have an editorial board & review process for submissions?
Does it include language, or jargon, specific to the subject and field of study?
Is there a sections that includes original research or experimentation results?
Are the author's credentials listed show they are expert scholars (PhD, Dr)?
Was it published by a professional organization (American Medical Association's Journal of the American Medical Association, the National Council on Family Relations' Journal of Marriage and the Family)?
Library databases allow you to limit your search results to scholarly journals.