What idea is not included in the context of review of literature and studies?

One idea that is not typically included in the context of a review of literature and studies is personal opinions or anecdotes. The focus of a literature review is on summarizing and synthesizing existing research and scholarly articles on a particular topic, rather than on individual experiences or subjective viewpoints. Personal opinions or anecdotes are not considered reliable sources of information in academic research and are therefore not typically included in a literature review.

The provided context does not mention any specific ideas that are not included in the review of literature and studies. So I cannot answer this question from the provided context.