We expect this to change based on their current environment. Profile I reports on a person's current or adjusted style. Extended DISC® Assessments contain two profiles. current work environment and to take Behavioural Modification into account. Some variance is expected in Psychometric testing due to different conditions, i.e. Important Note: Always seek out Psychometric Assessments that report on an individual's natural and adjusted style. If your client or company is asking for proof that an assessment is consistent or reliable, Cronbach's Alpha is a great indication! The assessments consistently achieve Cronbach's Alpha of at least 0.79 across each DISC Style (D=0.84, I=0.82, S=0.85 and C=0.79) which indicates that test-retest correlation is high. The reliability of Extended DISC® Assessments is tested using a mixture of test-retest and Cronbach's Alpha Methods. A general suggestion is that robust scientific instruments should have a Cronbach's Alpha of at least 0.7. Another form of reliability is Cronbach's Alpha which also provides a measure of consistency. This type of reliability assumes that there will be no change in the behaviour being measured. In this method, the test is evaluated by administering an assessment twice at two different points in time. One of the most common measures of reliability is test-retest reliability. It ensures the test produces the same or similar results every time it is taken. Reliability refers to the consistency of a test. Extended DISC® International completes a validation study bi-annually to ensure the results are reliable. Extended DISC® Assessments are one of the most highly validated and reliable workplace assessments.
It is important to note that, just because a test has reliability, it does not mean that it has validity. Validity is not regulated by a single test or statistic but by a body of research. The validity, an essential part of a reliable psychometric test, helps to determine whether or not the test measures what we believe it to be measuring.
A reliable test will produce a similar result every time. There are two fundamental requirements for any workplace assessment, reliability and validity. So, what exactly is psychometric validity, and how do you measure it?
One of our most frequently asked questions is about the validity of our assessments.
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