{Useful definitions} Types of Research Gaps

Facebook group Applied Linguistics Research Methods–Discussion shared a post:

Types of Research Gaps

Miles (2017) proposed a taxonomy of research gaps, built on the two previous models. It consist of seven core research gaps:
(a) Evidence Gap;
(b) Knowledge Gap;
(c) Practical-Knowledge Conflict Gap;
(d) Methodological Gap;
(e) Empirical Gap; and
(f) Theoretical Gap;
(g) Population Gap.Source:
Miles, D. A. (2017). A Taxonomy of Research Gaps: Identifying and Defining the Seven Research Gaps. In Doctoral Student Workshop: Finding Research Gaps-Research Methods and Strategies, Dallas, Texas.