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Tests and surveys

Tests and surveys

1. Online self-tests offers various free online self-tests on the topic of ADHD.

It would be wonderful if people who most definitely do not have ADHD could also take these tests so that the significance of the result can be improved.

1.1. Large ADHD Symptom Test

This self-test takes a good 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. - ADHD Online Test (Symptom Test) Version 4.0 (205 Questions).

On the validity and reliability of the ADxS online symptom test

The online test has now been completed by around 6400 subjects (as of December 2021). 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 %. However, the determination of these values originates from the self-declarations of the test persons (have a medical ADHD diagnosis / have certainly no ADHD), which on the one hand makes a considerable bias possible and on the other hand can contain considerable misstatements especially with the second statement. 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) other 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]( However, these values are measured against the much more stringent methods used to determine the quality criteria of diagnostic tests.

Version history:

1.0. - from 05. October 2018
2.0. - from 04 November 2018
3.0 - from 21 January 2020
3.0.1. - from 17 February 2020
4.0. - from 09 June 2020

1.2. External assessment test

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”, “derdiedas”) 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.

Version history:

3.0.1. - from 17 February 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.

Online differential test anxiety (60 questions)

The results have not yet been validated.

Version history:

1.0. - from 06 March 2020

1.3. Differential Diagnostic Test Depression

The depression online test for differential diagnosis takes a good 10 minutes. It aims to distinguish a possible depression from a possible ADHD disorder.

Online differential test depression (85 questions)

The results have not yet been validated.

Version history:

1.0 - from 21 March 2020

1.5. ADHD Medication Effectiveness Self-Test (3.0.1.)

This survey aims to determine the optimal setting of medications.

While the symptom test asks about the condition without medication, the ADHD medication effect test uses the same questions to map the condition during the medication effect.
The difference in the two tests shows how well the current medication is working on symptoms. - ADHD Medication Effects Test 3.0.

1.6. ADHD Response Self Test

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 ADHD secured or
  • Secured do not have ADHD.

In addition, we would be grateful if ADHD sufferers taking ADHD medication could perform the test once within and once outside the effective time of their ADHD medication.

This test demands the patience of the participants. - ADHD Reaction Test

1.7. SCT Self-Test on Sluggish Cognitive Tempo

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) to be a disorder in its own right that can co-occur with ADHD-I, less commonly with ADHD-HI, and also without ADHD.
To the best of our knowledge, the following test is the first German-language online test for SCT. - SCT online test (26 questions)

The results of the ADxS symptom test suggest that there is no correlation with the subtypes of ADHD, but that it is a separate dimension that may be present in parallel with ADHD-HI or ADHD-I, or without an existing ADHD.

1.8. (High) Sensitivity Self Test

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. - High Sensitivity Online Test (70 Questions)

The results have not yet been validated.

Notes on all self-tests

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

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 info@adxs,org with questions about it. We will only answer them if we could verify the authenticity of the questioner by asking for 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.

2. Surveys

2.1. Collection of physicians and therapists with ADHD expertise

Here we collect addresses of doctors, psychologists and other professionals with ADHD expertise

Please support us by entering professionals with whom you have had good (or bad) experiences regarding ADHD.