Distinguish GAD, agoraphobia and blood-injection-injury phobia
Apply the relevant ICD-11 features of three anxiety and fear-related disorders, then evaluate the GAD-7 and BIPI as measures rather than diagnostic substitutes.
Section OPTION-CL-1.4.1 · 1.4.1 Diagnostic criteria for anxiety and fear-related disorders
Original StudyForA educational content mapped to Cambridge 9990 Psychology 2028–2030 Version 1 and the WHO ICD-11 CDDR. This is not medical advice, a diagnostic tool or a substitute for qualified assessment. GAD-7 and BIPI scores are self-report measures, not diagnoses; do not screen or label learners with them. This is not Cambridge material, an official mark scheme or an awarded grade.
Before you begin
- This lesson covers 9990 Clinical Psychology topic 1.4.1 and follows the three 1.3 impulse-control sections. It introduces ICD-11 features and psychometric evaluation for study; it cannot diagnose a person.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which statement correctly describes the GAD-7?
What you will learn
- Describe the ICD-11 criteria for generalised anxiety disorder, agoraphobia and blood-injection-injury specific phobia
- Explain how the GAD-7 screens and assesses reported generalised anxiety symptoms
- Describe the development and psychometric evidence for the BIPI, including Mas et al. (2010)
- Evaluate questionnaire evidence using reliability, validity, subjective and objective data, and cultural context
Use the 2028–2030 ICD-11 framework and keep diagnosis separate from screening
Cambridge 9990 Clinical 1.4.1 asks about ICD-11 criteria for generalised anxiety disorder (GAD), agoraphobia and specific phobia focused on blood, injection and injury, alongside the GAD-7 and Blood-injection Phobia Inventory (BIPI). The WHO ICD-11 Clinical Descriptions and Diagnostic Requirements are written to support assessment by health professionals; this lesson gives a study summary, not a checklist for diagnosing yourself or another person.
The criteria share themes such as persistent fear or anxiety, avoidance or enduring a feared situation with distress, and significant impact. They differ in what the fear is about. Duration and impairment matter, and the clinician considers context, other possible explanations, medical conditions and medication or substance effects. One symptom, fear, score or fictional vignette cannot establish a diagnosis.
Cambridge's course label ‘blood-injection-injury specific phobia’ names the syllabus focus. In ICD-11 this is taught within specific phobia; the older subtype labels are not a separate ICD-11 subtype list. Do not import DSM duration rules, such as a fixed six-month criterion, when the question asks for ICD-11.
GAD: broad, persistent apprehension or worry
ICD-11 GAD involves marked anxiety that persists for at least several months and is present more days than not. It may take the form of general apprehension or excessive worry across several everyday areas, such as family, health, finances, school or work. Additional symptoms can include muscle tension or restlessness, autonomic arousal, nervousness, difficulty concentrating, irritability or disturbed sleep.
The pattern must cause significant distress or impairment in important areas of life. A health professional also considers whether symptoms are better explained by another health condition or a substance or medication. ICD-11 says ‘at least several months’; do not replace this with DSM-5’s six-month rule.
Anxiety before one exam or a difficult week is not enough to infer GAD. The diagnostic description concerns a persistent, broad pattern and its impact, assessed in the person's full context.
Agoraphobia: fear across situations where escape or help may seem difficult
ICD-11 agoraphobia concerns marked fear or anxiety across multiple situations in which escape might feel difficult or help unavailable if a frightening, incapacitating or embarrassing event occurs. The person may avoid the situations, enter only under particular conditions such as with a companion, or endure them with intense fear or anxiety.
The pattern persists for an extended period, for example at least several months, and causes significant distress or impairment. The central idea is the feared outcome and the pattern across situations, not simply a dislike of open spaces. Panic attacks may occur, but agoraphobia and panic disorder are separate ICD-11 diagnoses and may occur independently or together.
A vignette that says ‘avoids buses’ leaves important questions unanswered: what outcome is feared, whether other situations are involved, how long the pattern has lasted, its impact and whether another explanation fits better. Students should analyse the information supplied, not assign a diagnosis.
Specific phobia: a circumscribed fear, here focused on blood, injections or injury
Specific phobia involves a marked fear or anxiety that occurs consistently when a person encounters or anticipates a specific object or situation. For the Cambridge 1.4.1 focus, that may involve blood, injections or injury. The fear is disproportionate to the actual danger in the person's circumstances; the feared stimulus is avoided or endured with intense fear or anxiety.
Symptoms persist for at least several months and are severe enough to cause significant distress or impairment. A clinician considers cultural expectations, actual risk, health conditions and other possible explanations. Blood, injection or injury fears can be strong without meeting diagnostic requirements; the presence of a fear alone is not a disorder.
The ICD-11 framework should not be confused with older systems that listed blood-injection-injury as a formal subtype of specific phobia. The course focuses on this stimulus category for study, while the classification describes specific phobia more generally.
GAD-7: a brief self-report screen and severity measure
The GAD-7 is a seven-item self-report questionnaire about how often a person has experienced anxiety symptoms over the previous two weeks. It was developed to help identify probable GAD and assess reported symptom severity. Spitzer et al. (2006) compared its scores with independent mental-health professional assessments and measures of functioning in adults attending 15 US primary-care clinics.
The validation study included 2,740 adults who completed the questionnaire; 965 also completed a telephone interview with a mental-health professional within a week. The authors reported good reliability and several forms of validity in that sample. Scores were associated with functional impairment, and the authors presented the tool as a brief clinical and research measure.
A GAD-7 score records self-reported symptoms; it does not by itself confirm GAD, identify its cause or decide what care someone needs. The study sample was adult US primary-care patients, so performance and interpretation should not be assumed identical for every age, language, culture or setting. A screening result is not a diagnosis.
BIPI: a measure developed for blood-related anxiety and phobia
Mas, López Jiménez and Pérez San Gregorio (2010) developed the Blood-injection Phobia Inventory for Spanish-speaking participants. The instrument presents 18 blood-related situations or stimuli and asks about 27 phobic responses using a four-point response format. The study examined its psychometric properties in 174 participants.
The authors reported high internal consistency (Cronbach's alpha .98) and evidence of concurrent, convergent and discriminant validity. These are findings about that inventory and sample. High internal consistency means responses to the scale items tended to be consistent; it does not by itself prove that every item is necessary or that the inventory is valid for every person and purpose.
The BIPI collects subjective self-report, not direct observation of a person's complete behaviour or an ICD-11 diagnosis. Language, cultural meaning, memory and willingness to disclose can affect responses. A translated version needs evaluation in the intended population, and results should be interpreted alongside appropriate professional assessment rather than used to label learners.
Evaluate questionnaires using psychometric concepts
Reliability concerns consistency: for example, whether a measure gives reasonably consistent results when the construct has not changed. Validity asks whether the evidence supports the intended interpretation and use. A high reliability coefficient alone does not demonstrate validity, and a measure can be valid for one sample or purpose but not another.
Questionnaires make subjective experience easier to record in a standard format and can support quantitative comparison. They depend on what a person understands and reports; they can miss context, be affected by recall or response style, and require careful translation. A clinician interview can add context but also needs clear, consistent procedures.
When evaluating the GAD-7 or BIPI, name the sample and version, distinguish self-report score from diagnosis, and connect each strength or limitation to the actual evidence. Do not generalise a validation study to all students or cultures merely because the coefficient is high.
Sources for this lesson
- Cambridge International AS & A Level Psychology 9990 syllabus, 2028–2030
- Cambridge International AS & A Level Psychology 9990 Reference List, 2028–2030
- WHO ICD-11 Clinical Descriptions and Diagnostic Requirements
- Spitzer et al. (2006), GAD-7 development and validation · PubMed
- Mas et al. (2010), BIPI development and validity · journal article
- Mas et al. (2010), DOI
Pause and explain
What does Mas et al. (2010) support about the BIPI?
Worked example
A fictional case says an adult has avoided several crowded places for months because they fear being unable to leave or get help if they become unwell. Their GAD-7 score is also elevated. What can a student infer, and what remains unknown?
Show the worked solution
- Connect the described feared outcome and pattern across situations to relevant agoraphobia features without declaring a diagnosis.
- Explain that the GAD-7 is a report of recent symptoms and does not establish agoraphobia or GAD by itself.
- Name at least two missing assessment details, such as significant impact, wider history, alternative explanations or professional assessment.
Answer The description resembles features relevant to agoraphobia because the fictional person reports fear across multiple situations linked to difficulty escaping or getting help. The elevated GAD-7 records recent self-reported anxiety symptoms; it does not diagnose agoraphobia or confirm GAD. The vignette omits a full clinical history, impairment, alternative explanations and professional assessment, so it supports cautious application of criteria only.
Try a topic test
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Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Use three fictional summaries: A reports broad worry most days over several months with sleep and concentration problems; B avoids several situations because escape or help might feel difficult; C has a persistent, disproportionate fear of blood or injections that affects access to routine care. Identify which ICD-11 features each summary may illustrate and what a learner must not conclude.
Give me a hint
Match the content of the fear to the named condition, then check duration, impact and limits of the short descriptions.
Compare my reasoning
- A may illustrate features relevant to GAD because the worry is broad, persistent and accompanied by other symptoms; a full assessment of impact and other explanations is missing.
- B may illustrate agoraphobia features because the fear concerns multiple situations and difficulty escaping or obtaining help; the summary omits the full history and professional assessment.
- C may illustrate specific phobia focused on blood or injections if the fear is disproportionate and persistent with significant impact; no classroom description is enough to diagnose any person.
A, B and C resemble different syllabus examples: broad persistent worry for GAD, fear of difficult escape or unavailable help across situations for agoraphobia, and a persistent disproportionate blood/injection fear for specific phobia. The short summaries omit information a clinician would need, so students can identify relevant features but cannot diagnose anyone.
Look for these in your work
- Three patterns distinguished
- Duration and impact considered
- No diagnosis inferred
A student says, ‘My GAD-7 score is higher than a friend's, so I have GAD and they do not.’ Explain why this conclusion is unsupported. Then give one strength and one limitation of the GAD-7 evidence from Spitzer et al. (2006).
Give me a hint
Separate score comparison, screening interpretation and diagnosis; name the validation sample.
Compare my reasoning
- The GAD-7 measures recent self-reported symptoms; scores alone do not establish or rule out an ICD-11 diagnosis for either student.
- Spitzer et al. compared questionnaire responses with independent mental-health interviews and reported good reliability and validity in adults from US primary-care clinics.
- That validation supports use for screening and symptom measurement in the studied context, but the clinic sample and self-report format limit automatic generalisation to every age, language or school setting.
A higher score is a report of more frequent recent symptoms on a brief questionnaire, not proof that one student meets ICD-11 criteria or that another does not. Comparing scores may be useful for screening or follow-up. Spitzer et al. found good psychometric evidence against independent interviews in a large primary-care sample, but self-report and sample context limit universal interpretation.
Look for these in your work
- Score not equated with diagnosis
- A strength tied to the validation method
- A limitation tied to sample or self-report
A research team wants to use a translated BIPI in a new country. Plan an ethical validation study that checks the translation, reliability and validity without inducing fear or asking students to reveal personal diagnoses.
Give me a hint
Recruit consenting adults from the intended population, use independent professional comparison where suitable, and protect sensitive responses.
Compare my reasoning
- Translate and culturally review the instructions and response options with qualified bilingual reviewers; use cognitive interviews with consenting adults to check whether the items are understood as intended.
- Recruit a suitable adult sample with informed consent and secure, minimal data collection. Assess consistency over an appropriate interval and examine whether scores relate to an independent, qualified assessment or relevant established measure as predicted.
- Report who took part, how the comparison was made, uncertainty and limits on generalisation. Do not expose participants to blood or injury cues, use the scale to label learners, or treat internal consistency alone as proof of validity.
An ethical study would culturally review the translation, ask consenting adults whether items are understood, and compare scores with an appropriate independent assessment or measure while protecting privacy. Researchers could examine reliability and several forms of validity without inducing fear. Results would apply only to the tested version, sample and purpose; a high alpha alone would not validate it everywhere.
Look for these in your work
- Translation and intended population addressed
- Reliability and validity tested separately
- Consent, privacy and no induced exposure
Common mistakes
- Using DSM-5's six-month GAD duration when asked for ICD-11, which says at least several months
- Defining agoraphobia simply as fear of open spaces or requiring panic disorder to be present
- Treating blood-injection-injury phobia as a separate ICD-11 subtype rather than the Cambridge focus within specific phobia
- Calling a high GAD-7 or BIPI score a diagnosis
- Assuming high internal consistency proves validity or universal applicability
- Generalising Spanish BIPI validation findings to every translation, culture or age group
- Treating questionnaire self-report as direct observation of all behaviour
- Diagnosing a real learner from a classroom example or screening score
What can you explain now?
What does a high GAD-7 score establish by itself?
Compare with the explanation
A high level of self-reported recent anxiety symptoms on that questionnaire, to be interpreted in context.
The GAD-7 is a screening and severity measure, not an ICD-11 diagnosis or a substitute for a professional assessment.
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Make it stick
State one key feature of each ICD-11 condition, explain what the GAD-7 and BIPI measure, and give one reason neither questionnaire alone is a diagnosis.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.