Illness Attitudes Questionnaire

Abstract

The Illness Attitudes Questionnaire (IAQ) is a psychometric instrument designed to assess the specific attitudes and beliefs individuals hold regarding illness, physical symptoms, and perceived health risks. It measures maladaptive cognitive patterns often associated with excessive health anxiety and hypochondriasis. Respondents rate their level of agreement with statements covering themes such as catastrophic symptom interpretation, the need for medical certainty, anxiety intolerance, and perceived vulnerability to disease.

The IAQ is frequently used in clinical settings, particularly those applying Cognitive Behavioral Therapy (CBT), to identify and target underlying cognitive distortions contributing to chronic health worry. Its development is situated within the research context of established measures, such as the Health Anxiety Inventory (HAI), which was developed by Salkovskis and colleagues.

Keywords

Illness Attitudes Questionnaire, IAQ, health anxiety, hypochondriasis, cognitive distortions, illness beliefs, symptom perception, psychological assessment, CBT.

Authors

Paul M. Salkovskis, K.A. Rimes, H.M.C. Warwick, D.M. Clark (Associated research group and context for similar scales).

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Purpose

The primary purpose of the IAQ is to quantify the degree to which an individual holds specific, rigid, or catastrophic beliefs about health and physical symptoms. These beliefs are recognized as central maintaining factors in the development and persistence of clinical health anxiety, driving behaviors such as excessive reassurance seeking and body checking.

By measuring these underlying cognitive distortions, the questionnaire provides clinicians and researchers with a baseline measure of illness conviction. It is particularly useful for tracking therapeutic change, as successful intervention using CBT often requires directly modifying these maladaptive attitudes.

Construct

The IAQ measures the psychological construct of Maladaptive Illness Cognitions. This construct encompasses several core dimensions that drive health-related distress and functional impairment.

• Catastrophic Interpretation of Symptoms: The belief that any physical sensation or bodily change inevitably signals a serious, life-threatening illness (e.g., “Bodily changes are always a sign that something is wrong”).
• Intolerance of Uncertainty: The insistence on absolute medical certainty, leading to excessive worry about diagnostic errors (e.g., “Doctor’s often miss serious illnesses”).
• Perceived Lack of Control and Vulnerability: Beliefs regarding the inability to manage anxiety, control one’s own health outcomes, or the conviction that one is uniquely susceptible to severe illness (e.g., “I have no control over my health”).

Validity

While the original psychometric validation of the specific IAQ items often overlaps with the detailed validation of the broader Health Anxiety Inventory (HAI), measures of this type generally demonstrate strong Construct Validity. The items are designed to align theoretically with the cognitive model of hypochondriasis, effectively differentiating patients with pathological health anxiety from healthy controls or those suffering from general anxiety disorders.

The scale is expected to exhibit strong Criterion Validity, correlating positively and significantly with other established measures of health worry, illness conviction, and general anxiety. Its successful application in clinical trials further supports its utility as a measure sensitive to cognitive changes following targeted interventions.

Reliability

Based on established psychometrics for related instruments developed by the same research team, the IAQ is expected to demonstrate high levels of Internal Consistency. This measure, typically assessed using Cronbach’s alpha, should confirm that the various items consistently measure the same underlying construct of maladaptive illness attitudes, generally yielding alpha values above the clinical standard.

Furthermore, the IAQ should demonstrate acceptable Test-Retest Reliability, suggesting that individuals’ core illness attitudes remain stable over short periods in the absence of therapeutic intervention. This stability is crucial for ensuring the instrument provides reliable baseline data for treatment planning.

Factor Analysis

Specific factor structures derived from the IAQ are often analyzed in conjunction with the Health Anxiety Inventory (HAI). Exploratory and confirmatory factor analyses of these combined items generally support a multidimensional structure, indicating that illness attitudes are composed of distinct yet correlated factors.

Common factors identified in related instruments include the tendency toward catastrophic misinterpretation, heightened monitoring of bodily symptoms, and the need for medical certainty. Understanding these factors allows researchers to refine the cognitive model of health anxiety and tailor treatment protocols based on the specific type of maladaptive belief present.

Instrument

Test Type: Self-report questionnaire / Clinical assessment tool

Format: Paper-and-pencil or digital administration; multi-point Likert scale (7 points: TOTALLY AGREE to TOTALLY DISAGREE)

Language Available: Primarily English; translations are available for research purposes, particularly in settings utilizing CBT.

Population Group: Clinical and non-clinical adults exhibiting elevated levels of health worry or suspected hypochondriasis.

Age Group: 18 years and older (Adults).

Population Details: Used extensively in primary care settings and specialist CBT clinics focused on anxiety disorders and medically unexplained symptoms.

Test Methodology: Respondents are instructed to rate how typical each attitude or belief is of their way of thinking “MOST OF THE TIME,” circling one choice per statement on the 7-point agreement scale.

Keywords

Maladaptive cognitions, psychological assessment, symptom misinterpretation, cognitive restructuring, psychometrics, clinical screening, King’s College London.

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Authors

Author ORCID Identifier: N/A (Not provided in source)

Affiliation Email addresses: N/A (Not provided in source)

Correspondence Address: Centre for Anxiety Disorders and Trauma (CADAT), Institute of Psychiatry, Psychology & Neuroscience (IoPPN), King’s College London (Associated institutional context).

Permissions & Fee and Test Year

The IAQ is often utilized by researchers and clinicians associated with the Centre for Anxiety Disorders and Trauma (CADAT) at King’s College London. While the specific test year is not explicitly stated, its development is closely tied to the foundational research on health anxiety conducted by Salkovskis and colleagues in the late 1990s and early 2000s.

For current usage, licensing, and permissions, users are generally directed to the affiliated academic or clinical institution, as these scales are often available for non-commercial research and clinical use upon request.

The original PDF for the Illness Attitudes Questionnaire can be downloaded here: Illness Attitudes Questionnaire (PDF 158 kb).

Reference’s

The IAQ is contextually related to research detailing the Health Anxiety Inventory (HAI), which is a core measure of the construct.

Salkovskis, P.M., Rimes, K.A., Warwick, H.M.C. & Clark, D.M (2002) The Health Anxiety Inventory: development and validation of scales for the measurement of health anxiety and hypochondriasis. Psychological Medicine, Vol. 32, 843-853.

King’s College London, Institute of Psychiatry, Psychology & Neuroscience (IoPPN) – Centre for Anxiety Disorders and Trauma (CADAT) Research Questionnaires: http://www.kcl.ac.uk/iop/depts/psychology/about/support/CADAT/aboutus/Research/questionnaires/index.aspx

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Items of the ILLNESS ATTITUDES QUESTIONNAIRE

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

This questionnaire lists different attitudes or beliefs which people sometimes hold. Read EACH statement carefully and decide how much you agree or disagree with each statement.

For each of the attitudes‚ show your answer by putting a circle round the words which BEST DESCRIBE HOW YOU THINK. Be sure to choose only one answer for each attitude. Because people are different‚ there is no right or wrong answer to these statements.

To decide whether a given attitude is typical of your way of looking at things‚ simply keep in mind what you are like MOST OF THE TIME.

If medication doesn’t take away a symptom then I must have a serious illness.

If I experience an unexpected physical symptom I must be ill.

If I can’t control anxiety perfectly I am a failure.

Bodily changes are always a sign that something is wrong.

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Anxiety can kill.

If I don’t worry about my health‚ something will go wrong.

Doctor’s often miss serious illnesses.

Detailed tests· are the only way to really rule out an illness.

There is only so much anxiety my heart can take.

The commonest cause of feeling unwell is serious illness.

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The commonest cause of feeling unwell is serious illness.

If the doctor sends me for any tests‚ he is convinced that there is something wrong.

If your symptoms come and go‚ a test can only be accurate if done when the symptoms are present.

ha‎ving symptoms means I am weak‚ defective‚ flawed or inferior.

Real symptoms mm be produced by anxiety.

If I don’t keep a careful watch on my health something terrible will happen.

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There is only so much anxiety that my mind can take.

It is possible to know. With absolute certainty‚ that you are not ill.

If I am not perfectly calm I am in danger of losing control.

Once anxiety starts to build up you can’t stop it getting worse.

I or my doctor must be able to find an explanation for any physical symptom.

If you don’t control your thoughts you might go mad.

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Both sides of the body should be identical.

Parts of my body are weak.

My family is prone to Illness.

If I let myself think that I am well. I will tempt fate.

I am more likely than most people to get an illness.

Cancer is curable.

I deserve to get III.

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I have no control over my health.

I must look after my health or I will be a burden to my family •