Written by Keith Ayers.

There are many significant differences between the Everything DiSC® assessment and other DISC tools available in the marketplace, including our use of the little ‘i’ to differentiate our bestselling assessments from the others.

But what sets Everything DiSC apart as the most valid and reliable tool on the market?

The Assessment Questionnaire

The first DISC profile developed was a 24-item questionnaire developed by John Cleaver in the 1950s and most of the other DISC profiles available today still use a version of that original 24-item forced-choice questionnaire.

The Everything DiSC questionnaire that sets our profile apart is our use of a five-point Likert scale and our use of adaptive testing technology. There is no forced choice – respondents respond to all items. When the respondent answers inconsistently on any scale, the program asks additional questions to get a more accurate plot of their position on that scale.

This methodology increases the accuracy of the Everything DiSC assessment significantly over the 24 item version. This technology behind Everything DiSC profile is light years ahead of the technology behind other DISC profiles in the marketplace.

Four Scales versus Eight

Everything DiSC is the only DISC profile that measures more than the basic four scales of D, I, S and C. What our research has found is that the combination scales, Di, iS, SC and CD are not an addition of the two styles they represent – they are an integration of the two dimensions. For example, the Di style has strengths that are unique to the combination that are not shared by the D or i styles independently.

Research and Quality Standards

Everything DiSC is published by John Wiley & Sons, Wiley is a 208 year old multinational publishing company with a strong reputation in the academic and professional world.

You probably had several Wiley published text books during your university days. Wiley do not publish anything that has not met the most rigorous standards of validity and reliability.

The complete Everything DiSC Research Report is available from our website to anyone who wants it. In fact if you would like a copy Click HERE

So Wiley developed items that measure these four combination scales in 2007 when the first Everything DiSC profiles were released. The addition of adaptive testing technology in 2012 took our DiSC profile to another level.

Can a DISC Profile Measure Both Adaptive and Natural Behaviour?

Most other DISC providers claim that the first and second graphs measure adaptive and natural behaviour. This is a myth. The British Psychological Society, in the early 90s, performed its own validation study on the 24-item DISC questionnaire and concluded that graph one and two were measuring nothing more than different views of self-perception. Current DISC providers continuing to make this assertion are working with outdated and unsupported facts.

When a person is responding to the basic 24-item questionnaire they are simply focusing on their self-perception – a singular focus. It is implausible to then believe that they could get two different results from that single focus such as adaptive and natural behaviour.

Adjusting Results for Social Bias

It is standard practice in the world of psychometric testing to recognise that when a person is assessing themselves, they have a tendency towards social bias – to choose items that are more socially desirable as being like them, such as “friendly”, and to not choose socially undesirable attributes such as “aggressive”.

The original 24-item questionnaire developed by John Cleaver offered attributes that describe the different behaviours that DISC measures and asked which of these attributes are most like you, and which are least like you. Then the least scores were subtracted from the most to determine the difference. This formed three graphs – most like, least like, and the difference. The reason for this type of questionnaire design was to reduce the impact of people tending to answer with responses that were more socially desirable.

This showed up in the psychometric analysis in that Graph 3, the difference scores, were always more internally reliable than Graphs 1 or 2.

For some reason, many providers of DISC profiles do not provide the results of Graph 3 – the only graph that can show the person’s overall self-perception with the removal of the social bias.

What Happens After the Training?

In most cases people get their DISC profile during a training program and they learn how to use it in a variety of applications. Then it is up to them as to whether they do anything with it after the program – they have a print out of their profile.

Not with Everything DiSC!

After every person has received their profile they are given access to an online portal MyEverythingDiSC.com, designed to take their application of DiSC back into the workplace.

In addition to being able to learn more about their own profile and how much effort they are going to need to use to adapt to different styles, they can also explore the history of DiSC and access complete information about the research behind our Everything DiSC profiles – we have nothing to hide.

Free Comparison Reports

The most powerful application in MyEverthingDiSC.com is that everyone who has one of our profiles can generate a comparison report with anyone else who also has one of our reports – for free. Obviously this has benefits within an organisation where employees can learn how to improve their relationships with each other. However, if you and a friend, or your partner, who works for a different organisation want to create a comparison report – no problem! You can connect with anyone in the world who has taken an Everything DiSC profile and set up their free MyEverythingDiSC.com account.

We can very clearly say that Everything DiSC is the most thoroughly researched, valid, and reliable behavioural tool on the market.

My reason for writing this blog is that it is time that the truth was revealed about the false claims being made by other DISC profile suppliers. One of these companies is claiming that only they have the only “genuine DISC profile”.

What is genuine about a profile that claims to measure adaptive and natural behaviour when the British Psychological Society debunked this claim 23 years ago?

Everything DiSC® is a registered trademark of John Wiley & Sons, Inc.

Keith Ayers – Wednesday, March 16, 2016

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