1. The paper does not fit the scope of the journal.
2. The paper does not make a contribution to new knowledge.
3. The paper does not meet established ethical standards.
4. The paper has been carelessly prepared.
5. The paper has not been prepared according to journal’s guidelines for presentation.
6. The paper has methodological problems.
7. The amount of experiment was inadequate.
8. The statistics are inadequate.
9. The language is poor.
10. The paper is over the journal’s word limit
12. The paper cannot compete with the high quality of other papers submitted to the journal. 
13. Publication bias.
14. The data have been interpreted poorly.
15. The analysis is weak.
16. The literature review is inadequate.