What is a common limitation in literature reviews regarding data access?

A common limitation in literature reviews is indeed the limited access to certain past research materials. This is due to various factors such as subscription costs, restrictions imposed by publishers, or simply the historical unavailability of data that is no longer held in publicly accessible databases. Researchers may struggle to obtain key studies or datasets that are critical for a comprehensive review, particularly if the research was conducted a significant time ago or if it pertains to niche subjects where materials are scarce.

In the context of literature reviews, the ability to access past research is essential for establishing a foundation for current studies and understanding the evolution of a topic. When access is limited, it can lead to gaps in understanding and potentially skew the conclusions drawn from the review, as important historical perspectives may be overlooked. This limitation highlights the importance of broadening access to research materials and emphasizes the need for comprehensive databases that include both current and historical data.