Findings: No commonly shared EM concept was found. Instead, scholars have contributed largely by depicting particular attributes of EM. These attributes can be divided into core attributes of EM and meta-cognitive attributes of EM. While core attributes are easier to recognize and exhibited through behaviour, meta-cognitive attributes are more hidden within an individual. Mainly the Anglo-American perspective influences the research on EM. The dominating research design methods remain quantitative. Only one longitudinal and one qualitative study using in-depth interviews were identified in the pool. Links to other research areas are provided.