This paper is dedicated to presenting a new experimental method, test, or procedure.

They address the questions such as "How to do this...", and "How to improve this.."

Alternative names: Experimental paper

This paper provides a comprehensive overview of the state-of-the-art research conducted in a specific field.

It summarizes and indicates research gaps and possible directions for future research.

Three types of review papers - literature review, systematic review, meta-analysis

This paper is suitable for time-sensitive research subjects and disciplines. 

Alternative names: letters, rapid communication, brief communication, short reports, brief reports, micro article, research note

This paper allows discussion of a relevant topic from the perspective of the author. It presents the author's viewpoint on the interpretation, analysis, or method used in a published study.

Alternative names: Perspective paper, hypothesis paper, opinion paper, commentary

This paper describes data sets and observations that support innovative research and theoretical developments.

Alternative names: A resource paper

This paper provides a critical and unbiased evaluation of a book that is of interest to the journal's audience.

The review provides a summary of the book's content, and an assessment of its originality and value by a scholar who is an expert in the field of study.

This paper is different from the method paper as it provides very concrete instruction for the reader's guidance of the acquired knowledge.

Usually includes instruction on how to do something rather than how a method was done.

Alternative names: Tutorial paper, How-to paper

This paper is usually used in clinical areas. This paper is based on an observational study and reports unaltered conditions. It is a descriptive paper. 

Two types of case study papers are clinical case studies and clinical trials.

This paper introduces and discusses ideas and principles, either new or established, that are related to a specific field of study or body of knowledge.

It is more common to have theory papers in the fields of philosophy, literature studies, anthropology, humanities, and social science. However, it is less common in medical, natural, and engineering sciences.