Are all articles contained in a Peer Reviewed journal peer reviewed, as well?
Wilson has clearly stated in our definition of peer reviewed, that it refers to journals, not individual articles. This is the industry standard. The reason that those who follow this industry standard are all unanimous in identifying peer-reviewed journals rather than articles is because the journals themselves rarely indicate whether individual items are peer-reviewed. As a rule of thumb, a reasonable person can assume that editorials, short items, and book reviews are not peer reviewed. It’s also quite common in science journals to have a section of shorter communications that don’t undergo peer review in order to present results to the public more quickly. Sometimes a peer-reviewed journal will publish a long paper presented at a conference, and conference papers are almost never peer reviewed, but the journal won’t label it as non-peer-reviewed. The fact is, you can never be 100% certain that an individual item in a peer-reviewed journal has been reviewed, by how many reviewers, o
