It is about reviewing the critical points of current knowledge including substantive findings as well as theoretical and methodological contribution towards a particular subject. Nevertheless, they are secondary sources that do not report any new or original experimental work but as a thesis for preceding a research and results section.
A literature review must be
- organized around and related directly to the thesis
- synthesize results into a summary of what is and is not known
- identify areas of controversy in the literature
- formulate questions that need further research