What is the reliability of the WAIS-IV test?
What is the reliability of the WAIS-IV test?
The reliability and validity of the WAIS-IV is outlined in the Technical and Interpretive Manual [1]). The main reliability figure based on the standardisation sample for Full Scale IQ was 0.98, indicating good internal consistency.
What is the acceptable value for test-retest reliability?
0.7
Between 0.9 and 0.8: good reliability. Between 0.8 and 0.7: acceptable reliability. Between 0.7 and 0.6: questionable reliability. Between 0.6 and 0.5: poor reliability.
What can affect test-retest reliability?
Application of test-retest reliability is influenced by both the dynamic nature of the construct being measured over time and the duration of the time interval (Haynes et al., 2018). Many psychological phenomena such as mood can change in a short space of time.
Why we use test-retest reliability?
Why is it important to choose measures with good reliability? Having good test re-test reliability signifies the internal validity of a test and ensures that the measurements obtained in one sitting are both representative and stable over time.
How do you write inter-rater reliability?
Inter-Rater Reliability Methods
- Count the number of ratings in agreement. In the above table, that’s 3.
- Count the total number of ratings. For this example, that’s 5.
- Divide the total by the number in agreement to get a fraction: 3/5.
- Convert to a percentage: 3/5 = 60%.
What is high inter-rater reliability?
Inter-rater reliability is the extent to which two or more raters (or observers, coders, examiners) agree. High inter-rater reliability values refer to a high degree of agreement between two examiners.
How does the WAIS test work?
Like the traditional Stanford-Binet test, the WAIS also provides an overall score. On the WAIS, Wechsler instead compared scores of the test-taker to those of others in his or her general age group. The average score is fixed at 100, with approximately two-thirds of all scores falling somewhere between 85 and 115.
What is the current version of the WAIS test?
Description The current version of the test, the WAIS-IV, which was released in 2008, is composed of 10 core subtests and five supplemental subtests, with the 10 core subtests comprising the Full Scale IQ. With the new WAIS-IV, the verbal/performance subscales from previous versions were removed and replaced by the index scores.
Is the WISC–IV test-retest stability stable?
The evidence of the WISC–IV’s test-retest stability for subtest and composite scales was evaluated with information obtained from a sample of 243 children. Participants were administered the WISC–IV on two separate occasions, with a mean test-retest interval of 32 days.
What is the reliability coefficient of WISC IV?
The reliability coefficients for the WISC–IV composite scales range from .88 (Processing Speed) to .97 (Full Scale). The reliability coefficients of the WISC–IV composite scales are identical to or slightly better than corresponding composite scales in the WISC–III.
What are similarities on the WAIS?
The verbal comprehension index on the WAIS also includes a subtest called Similarities. This subtest asks the test taker to articulate the correlation between two words or concepts. For example, a test taker might be asked to say what the words “apple” and “orange” have in common.
