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8 Cards in this Set

  • Front
  • Back
What is reliability?
Reliability is the degree of CONSISTENCY and REPEATABILITY of a data collection instrument

** Most commonly forgotten
In what areas are measures subject to errors (variations)?
1. Variation in the CHARACTERISTIC being measured

2. Variation introduced by the EXAMINER

3. Variation due to the INSTRUMENT / METHOD used
What is Intra-Rater Reliability?
Whether a single rater can obtain similar results when measuring again
(Within Rater Reliability)
What is Inter-Rater Reliability?
Whether two or more raters obtain similar results measuring the same item
(Between Rater Reliability)
What is considered excellent reliabilty on the ICC score?
Anything from 0.80 to 1
What statistical tests can measure reliability?
Nominal Data:
Pearson Correlation and
- t-tests,
- ICC,
- R-squared

Categorical Data:
- Kappa Test
- Chi Squared test
What is the ICC?
Interclass Correlation Coefficient:
Measure of Reliability:
compares within subject variability to between subject variability
What will happen to ICC if between subject variability is too large?
It will not pick up within subject variability (ie Rolfs Article)