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- A reliable measurement is not always valid: the results might be reproducible, but they’re not necessarily correct. A valid measurement is generally reliable: if a test produces accurate results, they should be reproducible.
People also ask
What are reliability and validity of measurement scales?
Is a rating scale valid?
Is a reliable measurement always valid?
What is the validity of a quality assessment scale?
What is the difference between reliability and validity?
How do you assess scale validity?
Reliability and validity, jointly called the “psychometric properties” of measurement scales, are the yardsticks against which the adequacy and accuracy of our measurement procedures are evaluated in scientific research.
Four indicators of construct validity are relevant to scale development: convergent validity, discriminant validity, differentiation by known groups, and correlation analysis. Convergent validity is the extent to which a construct measured in different ways yields similar results.
There are two distinct criteria by which researchers evaluate their measures: reliability and validity. Reliability is consistency across time (test-retest reliability), across items (internal consistency), and across researchers (interrater reliability).
- Paul C. Price, Rajiv S. Jhangiani, I-Chant A. Chiang, Dana C. Leighton, Carrie Cuttler
- 2015
May 3, 2022 · Revised on 10 October 2022. Reliability and validity are concepts used to evaluate the quality of research. They indicate how well a method, technique, or test measures something. Reliability is about the consistency of a measure, and validity is about the accuracy of a measure.
Reliable measures, sometimes referred to as good measures, are those which measure a variable precisely and consistently. At least four related factors determine how ‘good’ a measure is: (a) Precision: How free are the measurements from random errors? The degree of precision is represented by the number of significant figures in the measurement.
- Paul Martin, Patrick Bateson
- 1993
In general, a test-retest correlation of +.80 or greater is considered to indicate good reliability. Figure 4.2 Test-Retest Correlation Between Two Sets of Scores of Several College Students on the Rosenberg Self-Esteem Scale, Given Two Times a Week Apart.
Jan 1, 2014 · A rating scale is valid if it measures what it is intended to measure in the specific study. The validity of self-estimated subjective phenomena is relative and cannot be assessed absolutely. The validity of a scale is study specific, and must be considered each time the scale or the questionnaire is chosen for a new study.
