What is one primary purpose of a research literature review?

One primary purpose of a research literature review is indeed to suggest appropriate research methods. A literature review synthesizes existing research on a topic, allowing researchers to identify gaps in knowledge, understand current trends, and evaluate various methodologies that have been used in earlier studies. By analyzing previous works, researchers can determine which methods were effective and which were not, guiding them in designing their own studies. This foundation is crucial for developing robust research proposals and ensuring that new studies contribute meaningfully to the field.

The other options provided do not encompass the main aim of a literature review. For instance, citing only secondary sources would restrict a comprehensive understanding of a topic, as primary studies provide firsthand evidence essential for research. Summarizing historical studies is a component of a literature review but does not capture its broader scope and purpose. Furthermore, avoiding the construction of a conceptual framework contradicts the intent of a literature review, which typically helps in forming or refining such frameworks based on existing knowledge and theories.