This is a question that we are asked frequently, – and with good reason!
There are a large number of DISC based assessment systems available in the market and because all that we have seen focus on a person’s conscious behavioural style, they seem to be accepted generally because of their simplicity.
Extended DISC’s focus on the unconscious does naturally invite questions as to the system’s accuracy. For this reason, Extended DISC International have initiated validity studies in several languages, and although there has not yet been a validation report completed for “English-Australasian”, we can take some pointers from the validation study completed last year for “English-US”.
The statistics are interesting.
- Profile II Obtained Internal Consistency = 0.79 (As a comparison, Inscape Personal Profile System 2800 series = 0.59)
- Profile II Adjusted Internal Consistency = 0.82 (Inscape = 0.78)
- Expected Low vs Actual Low = 0.97 (This measures the percentage of each of the rows (24 x 4) of the questionnaire the desired type (DISC) of person responds to negatively (Least). The figure is 98.7% in the most recent up-date of the study. Importantly, the “Least” answers produce the unconscious self. (More about this in the next issue).
This means that overall every single option (row) in the questionnaire elicits the desired type of action in desired types of people. The validation studies are evidence of the continuous effort to ensure Extended DISC assessments the most accurate and reliable in the business.
Article source: Extended DISC Australasia