Examlex
In an experimental research study, if the researcher finds a statistically significant difference between two or more of the groups representing different treatment conditions, she or he can have some confidence in attributing causality to the IV.
Reliability
The consistency and stability of measurements or assessments over time.
Validity
The degree to which a tool, test, or measure accurately represents or measures what it claims to.
Variability
The extent to which data points in a set differ from each other and from the average, indicating the spread or dispersion.
Reactivity
The tendency of participants to change their behavior due to the awareness of being observed or studied.
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