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At the moment, only the symptom test is available in English. We are working on making the other tests accessible in English as well, which will be done gradually by May 2023.
We would be grateful if native speakers could help us to perfect the wording.
ADxS.org offers various free online self-tests on the topic of ADHD. All tests are mere online screenings that only serve to get an impression whether a medical diagnosis might be useful. They can in no case replace a diagnosis.
It would be wonderful if people who most definitely do not have ADHD could also take these tests to improve the significance of the results.
This self-test takes just under 30 minutes and asks very extensively about all known and related symptom groups of ADHD.
The result is compared with that of other participants and also gives values as might be expected according to DSM 5 and ICD 10.
On the validity and reliability of the ADxS online symptom test
The online test has now been completed by around 20,000 subjects (as of January 2023). The results of the first test persons corresponded to the indicated medical ADHD diagnoses to approx. 92 %, whereby test persons who stated that they “certainly do not have ADHD” (which does not represent a negative medical diagnosis) were recorded by the test as having ADHD to 18.5 %. The determination of these values is based on the self-declarations of the test persons (have medical ADHD diagnosis / have certainly no ADHD), which on the one hand makes a considerable bias possible and on the other hand - especially with the second statement - can contain considerable misstatements. In addition, the agreement of the symptom test was compared with an ADHD test tested for validity and reliability, which is used for medical diagnosis. The agreement here was around 96% (also dimensional).
Ultimately, the symptom test is based on the diagnostic manuals of DSM 5, ICD 10 and others. These are determined on the basis of factual questions, just as a physician would do in a diagnostic interview on the basis of his experience, without these questions being validated in detail. A medical diagnosis, however, is based on (several) further questionnaires and tests, which are themselves validated. Therefore, our online tests can never replace a medical diagnosis and only serve as a suggestion to make one.
Diagnostic tests are tested on selected groups of subjects (usually according to demographic criteria), who are then diagnosed at great expense by specialists. We cannot afford these (very expensive) procedures for financial reasons. However, this is not unusual for a free online screening, which is neither used commercially nor for medical diagnosis. An exception is the ASRS created by the WHO, which is available as an ADHD self-test.
Scientific investigative approaches to diagnosing ADHD often achieve consistency of 85% or less.1 Trained diagnosticians and experienced clinicians achieved diagnostic agreement of 88%.2](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3737570/) However, these values are measured against the much more rigorous methods used to determine the quality criteria of diagnostic tests.
With the third-party assessment test, third-party assessments can be included in the result. The third-party assessment test is based on the large symptom test in version 3.0.1. and takes a good 30 minutes.
In the Test Results section (Tests and Surveys / Account Management / Test Results) you will find an individual link. This can be passed on to one or more third parties. With this link, the third parties can each take their own third-party assessment test for this testing account. They do not need any account data for this.
The test asks who the third party was, (“partner”, “math teacher”, “whatever”) so that multiple outside assessment tests can be distinguished by the labels.
Under “Account test results”, the user’s own symptom test and the one or more different third-party assessment tests as well as the other tests can then be compared with each other.
This should make the test result even more accurate.
The third parties only see the result of the third-party assessment test they each took themselves, but not other third-party assessment tests or the other test results.
3.0.1 - as of February 17, 2020
1.3. Differential diagnostic test anxiety disorders¶
The anxiety online test for differential diagnosis takes just under 10 minutes. Its purpose is to distinguish possible anxiety disorders from a possible ADHD disorder.
This survey aims to determine the optimal setting of medications.
While the Symptom Test asks about the condition without medication, the ADHD Medication Effects Test uses the same questions to map the condition during medication effects.
The difference in the two tests shows how well the current medication is working on symptoms.
This reaction test takes about 15 minutes and works on desktop as well as mobile.
Currently, we do not have any comparative values. In order to determine comparative values, we need participants who have
Have secured ADHD or
Secured do not have ADHD.
In addition, we would be grateful if ADHD sufferers taking ADHD medication could take the test once within and once outside the effective time of their ADHD medication.
This test demands the patience of the participants.
1.8. SCT self-test for Sluggish Cognitive Tempo (SCT) / Cognitive Disengagement Syndrome (CDS)¶
The SCT test takes about 7 minutes.
SCT has long been described as a separate subtype of ADHD, a kind of extreme case of ADHD-I.
Recent research considers SCT (Sluggish Cognitive Tempo) as a distinct disorder that can co-occur with ADHD-I, less commonly with ADHD-HI, and even without ADHD.
To the best of our knowledge, the following test is the first German-language online test for SCT.
The results of the ADxS symptom test suggest that there is no correlation between SCT and individual subtypes of ADHD, but that it is a separate dimension that may exist in parallel with ADHD-HI or ADHD-I or without an existing ADHD.
The (high) sensitivity self-test tests increased sensitivity and takes a good 10 minutes. Unlike online tests on high sensitivity that we have seen so far, high sensitivity alone is not queried, as this could cause a strong tendency in answering.
All online tests offered here are not (yet) scientifically validated and will never replace a professional diagnosis. ADHD or SCT cannot be diagnosed by questionnaires alone. This also applies to the tests offered here, no matter how comprehensive they are. It always requires a personal medical / psychological diagnosis, preferably by a specialized doctor or psychologist.
The data are used exclusively for scientific purposes. Among other things, they serve to collect and aggregate knowledge about ADHD and are stored and evaluated in anonymous form for this purpose by the operators of ADxS.org.
No data is stored that allows conclusions to be drawn about the person (in particular no IP addresses, e-mail addresses or names). We do not have and do not want any knowledge about the person of the account. There is no use for other than scientific purposes.
If you would like to know more about a test that concerns you, you can make a note of the ID you provided and send an e-mail to email@example.com with questions about it. We will only answer these questions if we have been able to verify the authenticity of the questioner by requesting test data. All answers are given solely from a scientific point of view. No statements are made in the direction of a diagnosis or treatment recommendation.
Test results can also be accessed later via the test results links and via the test results page of the testing account.