Some common reasons that lead to paper rejection based on research.

Lack of novelty or significance: Academic papers must contain original research and provide new insights or contributions to the field. If a study does not provide significant or unique results, it may not be considered for publication.

Poor writing: Clear and concise writing is essential for academic papers. Poor grammar, spelling mistakes, and unclear writing can reduce the readability and credibility of the paper.

Lack of clarity in research methodology and data analysis: It is essential to provide clear details of the research methodology and data analysis techniques used in the study. If these are unclear, it can be challenging for reviewers to assess the validity of the study.

Failure to follow submission guidelines: Many journals have specific guidelines for paper submission, including formatting and referencing style. Failure to follow these guidelines can lead to immediate rejection of the paper.

Inadequate literature review: A comprehensive and relevant literature review is essential to demonstrate the novelty and significance of the research. If the literature review is inadequate or outdated, it can be difficult to convince reviewers of the relevance and originality of the study.

Weak conclusions or incomplete discussion: The conclusion and discussion section of the paper must be well-written and provide a clear summary of the study's findings. If these sections are weak or incomplete, it can be difficult to convince reviewers of the study's significance and contribution to the field.

Failure to state explicit and meaningful research question(s).

Failure to tailor the literature review to the research question(s).

Inadequate justification of the method(s) being used.

Inadequate connection between the Results and the research question(s).

Dear Ali M. Karkour

It could happen because:

• The use of artificial intelligence to search for coincidences with the objectives of the journal
• Little interest from publishers in new topics
• Prioritize a circle of close known authors
• Lack of knowledge on the part of the primary evaluators in relation to the subject
• Excess Items Received
• And more

This is just my opinion.

Common reasons for manuscript rejection:

1. Lack of novelty or originality

2. Weak research design, methodology, or data analysis

3. Poor organization and clarity in presentation

4. Inadequate literature review or failure to address existing work

5. Incomplete or inconsistent results

6. Poor writing quality with grammatical errors

7. Failure to meet journal guidelines

8. Insufficient contribution or impact in the field

You could go through the following articles for in-depth insights.

Ali, J. (2010). Manuscript rejection: Causes and remedies. Journal of Young Pharmacists, 2(1), 3–6. https://doi.org/10.4103/0975-1483.62205

Colwell, A. S., Wong, F. K., & Chung, K. C. (2022). Why do manuscripts get rejected? Plastic and Reconstructive Surgery, 150(5), 1169. https://doi.org/10.1097/PRS.0000000000009627

Good luck,

Wrongly targeted journal, not following submission guidelines, poor novelty of the submission, too many problems in one manuscript, weak research design...