Generally, the actual worker working in any experiment or the worker having the highest contribution in the research or writing of the article is considered as the first author of the article.
In many journals, all the names after the first three (3), five (5), or six (6) authors are together written as et al. during referencing.
Is it true that all et al. authors are always having a contribution to the research/ preparation of article?
Is it logical to consider anybody as an expert or even a worker of any field of research who is not even a SINGLE publication as the first author and in all of the publications, s/he is under the category of ‘et al.’?
Or, the ‘first author’ should get preference in such cases?