Which concept refers to consistent results generated over various research sessions?

The concept that signifies consistent results generated over various research sessions is data reliability. This term refers to the degree to which repeated measurements under unchanged conditions yield the same results. When research is reliable, it indicates that the findings can be replicated and are dependable over time and across different situations. Reliability is crucial for establishing trust in the outcomes of research, as it suggests that the data collected is stable and not subject to random variations or external fluctuations. In essence, high reliability in research strengthens confidence in the validity of the conclusions drawn from the data.

Other concepts in the question address different aspects of research methodology: for instance, data variability focuses on the spread or dispersion of data points within a dataset, while research bias refers to systematic errors that can affect the integrity of results. Research rigor involves the thoroughness and precision of the research design and methodology, but it does not specifically denote consistency over multiple sessions like reliability does.