Oversimplified Journal Categorization
The reliance on Scopus classifications and the simplified journal type categorization can lead to an oversimplified and potentially inaccurate view of journal-field relationships. The definition of "cross-field" journals based solely on multiple Scopus classifications doesn't account for other factors like topic overlap, field relatedness, and journal inclusivity/generality.
The text-matching method based on titles and abstracts might not fully capture the nuances of research topics and methodologies discussed in full-text articles. This limitation is acknowledged by the authors but could still influence the identification of publishing practices and journal-field matching.
Limited Generalizability to All Fields
The study focuses on journals with at least 100 articles in 2022, which could underrepresent journals in the arts and humanities that tend to have fewer publications per year. This limits the generalizability of the findings to all academic fields.
Subjectivity of Field Definitions
The subjective nature of field definitions and scope can influence the evaluation of journal-field matching and the classification of cross-field journals. The authors recognize this limitation, highlighting how researchers themselves might vary in their field definitions.
The study only analyzes data from 2022, which might not reflect the evolving relationships between journals and fields over time. Journal classifications and publishing practices can shift due to various factors, which limits the long-term validity of the findings.