Examlex
Suppose the exchange rate is $1 to 0.8 euros today, and tomorrow becomes $1 to 0.9 euros. Which of these describes what happened?
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.
Internal Consistency Reliability
Reliability assessed with data collected at one point in time with multiple measures of a psychological construct. A measure is reliable when the multiple measures provide similar results.
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