Which of the following statements is true regarding authorship practices? 1: In scientific fields, authors have to be listed in order of seniority.

Which of the following statements is true regarding authorship practices?

1: In scientific fields, authors have to be listed in order of seniority.

2: In scientific fields, authors must be listed in alphabetical order.

3: Both within and between disciplines, practices differ with regard to who should be

included as an author, and in what order they should be listed.

4: Journals do not permit a graduate student to be listed as the first author.