Zeyad - not at all - especially if you go by highest in 'disciplines'. In my discipline, I say to my research students (undergrad and post-grad) that, even in the highest ranking journals, there is a form of distribution i.e. about 30% are poor quality, about 15-20% are excellent - and the rest are 'average. That's why I stress the importance of critical appraisal of individual studies. Of course, the other issue here is that one has to define 'excellence' and that may be purely subjective in some cases. However, the more that one follows critical appraisal tools - the less likely that is.

Zeyad - not at all - especially if you go by highest in 'disciplines'. In my discipline, I say to my research students (undergrad and post-grad) that, even in the highest ranking journals, there is a form of distribution i.e. about 30% are poor quality, about 15-20% are excellent - and the rest are 'average. That's why I stress the importance of critical appraisal of individual studies. Of course, the other issue here is that one has to define 'excellence' and that may be purely subjective in some cases. However, the more that one follows critical appraisal tools - the less likely that is.

The term "excellent" may be overrated. Not all are excellent but a good read I presume.

Yes, I think that the vast majority of articles published in magazines with high impact factor present a high-class research

According to my experience, there is practically no correlation between scientific value ("excellence") of a paper and "impact factor" of the journal it has been published in - indeed, several journals with very low or even without formally ascribed IP are scientifically much more interesting (publish ideas and results of more originality, less schematic elaboration, less dogmatic interpretation, neither adherring to current fashions - "mainstream" - nor striving to shock with counter-intuitive terminology, &c.), than the majority of "high-ranked" ones fettered by editorial whims (ridiculously fiddle-faddle "editorial standards") and omnipoence of "besserwisser" "peer"-reviewers!

Thank to DR. Dean Whitehead for useful information

Thank to Dr. Leonid V Vladimirov , Allemar Jhone P. Delima and Roman Bohdan Hołyński for useful information

Dear Zeyad Mohammad,

I sincerely think so.

In my opinion, it is not always true that all articles accepted in journals with the highest impact factor are excellent articles. In some cases they are not up to the mark but may be placed in high impact factor journals. More importantly, the editorial policy govern all these issues.