International Adjustment Disorder Questionnaire (IADQ)
Complete the 19-item IADQ to review symptom severity and its five-requirement probable-pattern algorithm with private in-tab processing.{{ summaryTitle }}
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After a stressful life change, distress may come less from fear of the event than from being unable to stop thinking about it or struggling to adjust daily life around it. Adjustment disorder is concerned with that link between an identifiable psychosocial stressor, a characteristic response, the timing of onset, and impaired functioning.
The International Adjustment Disorder Questionnaire (IADQ) organizes the experience into five requirements. At least one current stressor must apply. The past-month symptom questions then look for preoccupation and failure to adapt. A separate question records whether the problems began within one month of the stressor, and three questions examine effects on social life, work or education, and other important areas.
| Concept | What it covers |
|---|---|
| Psychosocial stressor | A currently applicable life problem or change, such as financial, work, education, relationship, health, caregiving, housing, or discrimination-related difficulty. |
| Preoccupation | Repeated thoughts, worry, or rumination centered on the stressful situation. |
| Failure to adapt | Difficulty adjusting, carrying out daily activity, or recovering a workable routine. |
| Functional impairment | Interference with social life, work or education, or another important area. |
The questionnaire produces dimensional symptom totals and a probable-pattern result from literal item thresholds. Those are different outputs. A severity total can describe how much was endorsed, but it cannot replace the five-requirement algorithm. Conversely, meeting every questionnaire requirement does not establish a diagnosis or rule out depression, anxiety, trauma-related conditions, grief, medical causes, or another explanation.
The IADQ is suitable for voluntary adult self-report, research, screening, or preparation for an informed clinical discussion. It is not an emergency assessment and contains no direct question about self-harm, suicide, violence, or immediate danger. Urgent safety concerns require direct human assessment rather than interpretation of this score.
How to Use This Tool:
Begin with the nine current-stressor questions; the symptom section applies only when at least one listed stressor is marked Yes.
- Select Start IADQ and identify every stressor category that currently applies. The count records categories, not how severe the situation is.
- If no current stressor is endorsed, review Items 1–9. The questionnaire does not allow the symptom section to continue until at least one applicable stressor is selected.
- Rate the six preoccupation and failure-to-adapt symptoms for the past month, then answer whether the problems began within one month of the stressful event or events.
- Complete the three functional-impact questions and read both the symptom severity score and the five criterion rows. Use the probable-pattern label only as a self-report screening result.
Interpreting Results:
The 0-to-24 symptom severity score adds the six symptom responses. Higher totals mean more reported preoccupation and failure-to-adapt burden in the past month, but there is no stand-alone diagnostic cutoff for that total.
The probable-pattern result is present only when all five requirements are met. If the result says that fewer than five requirements are present, inspect the criterion profile rather than treating the difference as a near-diagnosis. A response just below one symptom threshold changes the rule outcome even when the overall symptom total is high.
Bring a concerning result, persistent distress, or impaired functioning to a qualified health professional who can use an interview and broader history. A low or incomplete IADQ pattern does not show that support is unnecessary, and a complete pattern does not determine treatment.
Technical Details:
The IADQ uses 19 direct-coded items. Stressors and the onset question are binary. Symptom and impairment items use values 0 through 4. No item is reverse-scored, and all responses required by the gated questionnaire path must be complete before a result is produced.
Formula Core:
Preoccupation is the sum of Items 10–12, failure to adapt is the sum of Items 13–15, and symptom severity adds those two domain totals.
| Score | Items | Range |
|---|---|---|
| Current stressor count | Items 1–9, each No = 0 or Yes = 1 | 0 to 9 |
| Preoccupation | Items 10–12 | 0 to 12 |
| Failure to adapt | Items 13–15 | 0 to 12 |
| Symptom severity | Items 10–15 | 0 to 24 |
| Functional impairment | Items 17–19 | 0 to 12 |
Rule Core:
The final rule is an all-of gate. Each row below must be true; one missing requirement makes the probable-pattern value absent.
| Requirement | Exact rule |
|---|---|
| Current stressor | At least one of Items 1–9 equals 1. |
| Preoccupation | At least one of Items 10–12 is greater than or equal to 2. |
| Failure to adapt | At least one of Items 13–15 is greater than or equal to 2. |
| Onset | Item 16 equals 1, indicating onset within one month. |
| Impairment | At least one of Items 17–19 is greater than or equal to 2. |
The result preserves literal integer responses and uses no weighting, imputation, normalization, or rounding. Exactly five met requirements produce the probable pattern; zero through four do not.
Safety, Limitations, and Privacy:
The IADQ does not conduct a clinical interview, assess alternative diagnoses, establish causation, or determine whether a response is proportionate to its cultural setting. It must not be used alone for treatment, employment, insurance, legal, eligibility, or emergency decisions.
Responses and results stay in the current browser tab. They are not added to the URL, transmitted to a server, or stored by the assessment. Starting over clears the in-memory response set; copied or downloaded records remain the user's responsibility.
If distress becomes difficult to manage or there is concern about immediate harm, pause the questionnaire and contact an appropriate local professional, crisis service, or emergency service. The absence of a direct safety item means the IADQ score cannot clear a safety concern.
References:
- International Adjustment Disorder Questionnaire, International Trauma Consortium.
- International Adjustment Disorder Questionnaire, English form and diagnostic algorithm, International Trauma Consortium.
- Measuring ICD-11 adjustment disorder: development and initial validation of the IADQ, Acta Psychiatrica Scandinavica, 2020.