Characteristics of obsessive-compulsive disorder | AQA A-Level Psychology Revision
- Revision Notes
- Aug 3
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Updated: 7 days ago
For 7182 specification, first teach in September 2025
AQA A-Level Psychology | Free Revision Notes
Estimated study time: 40 minutes
These Characteristics of obsessive-compulsive disorder A-Level Psychology revision notes explain the behavioural, emotional and cognitive features of obsessive-compulsive disorder, usually shortened to OCD. Behavioural characteristics include compulsive actions and avoidance. Emotional characteristics include anxiety, distress, low mood and self-loathing. Cognitive characteristics include intrusive obsessive thoughts, selective attention, coping strategies and insight into the irrationality of the behaviour. You will also learn the crucial distinction between an obsession, which is a recurring thought, and a compulsion, which is an action or mental ritual.
Learning Objectives 🎯
By the end of this revision page, you should be able to:
Describe the behavioural characteristics of OCD.
Describe the emotional characteristics of OCD.
Describe the cognitive characteristics of OCD.
Distinguish obsessions from compulsions.
Identify OCD characteristics in unfamiliar scenarios.
Use accurate psychological terminology when answering application questions.
Revision Notes 📚
Characteristics of obsessive-compulsive disorder A-Level Psychology revision overview
Obsessive-compulsive disorder, or OCD, is associated with recurring intrusive thoughts and repetitive behaviours or mental acts.
The name identifies its two central features:
Obsessions are recurring and intrusive thoughts, images or impulses.
Compulsions are repetitive behaviours or mental acts performed in response to an obsession or according to rigid rules.
OCD involves three categories of characteristic:
Category | Central question |
Behavioural characteristics | What does the person do? |
Emotional characteristics | What does the person feel? |
Cognitive characteristics | What does the person think, notice or believe? |
The three categories often interact.
For example:
Intrusive thought about contamination → intense anxiety → repeated washing
In this sequence:
The intrusive thought is cognitive.
The anxiety is emotional.
The washing is behavioural.
Characteristics are not explanations
A characteristic describes what OCD looks or feels like.
An explanation accounts for why the disorder may develop.Neural explanations of OCD | AQA A-Level Psychology Revision
For example:
Repeated checking is a behavioural characteristic.
inherited vulnerability is a possible explanation.
brain structures and neurotransmitters form another explanation.
Do not replace characteristics with biological explanations when the question asks you to describe OCD.
Characteristics are not treatments
A treatment aims to reduce symptoms.
For example, medication used to reduce OCD symptoms is not a characteristic.
In an examination, check whether the question asks about:
Characteristics.
Explanations.
Treatment.
Application to a scenario.
Obsessions and compulsions
What is an obsession?
An obsession is a recurring, intrusive thought, image, idea or impulse.
Obsessions may be:
Unwanted.
Difficult to dismiss.
Repetitive.
Distressing.
Inconsistent with what the person wants to think.
Recognised by the individual as unreasonable or excessive.
Examples could include recurring thoughts about:
Contamination.
Germs.
Whether a door has been locked.
Accidentally harming somebody.
Whether an appliance has been switched off.
Objects being arranged incorrectly.
Making a serious mistake.
Something terrible happening unless a particular action is completed.
An obsession is primarily a cognitive characteristic because it concerns thought.
What is a compulsion?
A compulsion is a repetitive behaviour or mental act that the person feels driven to perform.
Compulsions may include:
Washing.
Checking.
Repeating an action.
Arranging objects.
Counting.
Seeking reassurance.
Following a rigid sequence.
Repeating particular words mentally.
Compulsions are usually performed in an attempt to:
Reduce anxiety.
Neutralise an obsessive thought.
Prevent a feared event.
Create a feeling that something is safe or complete.
The basic relationship
The common pattern is:
Obsession → anxiety → compulsion → temporary reduction in anxiety
For example:
A person experiences an intrusive thought that their hands are contaminated.
The thought produces intense anxiety.
The person washes their hands repeatedly.
Anxiety falls temporarily.
The obsessive thought returns later.
The washing ritual is repeated.
The compulsion may reduce distress briefly without removing the underlying obsession.
The essential distinction
Obsession | Compulsion |
A recurring intrusive thought, image or impulse | A repeated action or mental ritual |
Primarily cognitive | Usually behavioural, although some compulsions are mental |
Produces anxiety or distress | Is performed to reduce anxiety or prevent a feared event |
Example: “My hands are contaminated” | Example: washing repeatedly |
Example: “The door may be unlocked” | Example: checking the lock many times |
Example: “Something terrible will happen” | Example: repeating a sequence to prevent it |
Exam-ready comparison
An obsession is an intrusive and recurring thought, image or impulse, whereas a compulsion is a repetitive behaviour or mental act performed in response to the obsession, usually to reduce anxiety.
This direct comparison is stronger than giving two unrelated definitions.
Behavioural characteristics of OCD
The main behavioural characteristics are:
Compulsive behaviour.
Avoidance.
Compulsive behaviour
Repetitive actions
Compulsions involve repeating an action, often according to a particular rule.
The person may feel that the action must be completed:
A fixed number of times.
In a particular order.
Until it feels correct.
Until doubt or anxiety decreases.
Before another activity can begin.
Examples include:
Washing hands repeatedly.
Returning to check a locked door.
Checking that appliances are switched off.
Arranging objects symmetrically.
Touching items in a particular sequence.
Repeating an ordinary action.
Asking the same question for reassurance.
Compulsions are difficult to resist
The person may recognise that the behaviour is excessive but still feel unable to stop.
Attempts to resist may lead to:
Increased anxiety.
Distress.
A sense that something is incomplete.
Fear that a harmful event will occur.
A powerful urge to restart the ritual.
The behaviour may therefore continue even when the person understands that it is not logically necessary.
Compulsions are not usually enjoyable
Compulsive behaviour should not be confused with an enjoyable habit.
The person may dislike the ritual but feel driven to complete it.
For example, somebody may not enjoy checking a door repeatedly.
They may continue because stopping produces intense doubt or anxiety.
Compulsions attempt to reduce anxiety
The behaviour is often intended to reduce the distress created by an obsession.
Examples include:
Obsession | Possible compulsion |
“My hands are contaminated” | Repeated washing |
“The door may be unlocked” | Repeated checking |
“The objects are not arranged safely” | Reordering them |
“I may have made a harmful mistake” | Seeking repeated reassurance |
“Something bad will happen unless I complete the sequence” | Repeating an action or mental ritual |
The connection may be understandable, such as checking a door after doubting that it is locked.
In other cases, the action may not have a realistic connection with the feared event.
Compulsions can become time-consuming
A ritual may take up substantial amounts of time.
For example, a person might:
Take several hours to prepare to leave home.
Return repeatedly to check appliances.
Complete a washing routine before touching ordinary objects.
Repeat parts of a task until they feel correct.
This can interfere with:
Education.
Employment.
Relationships.
Sleep.
Travel.
Personal care.
Ordinary responsibilities.
This interference can also be understood through the ability to cope with everyday demands.
Compulsions may involve other people
Family members or friends may become involved in the ritual.
The person may repeatedly ask:
“Are you certain the door is locked?”
“Did I touch anything dirty?”
“Do you promise nothing bad will happen?”
“Can you check this again for me?”
Repeated reassurance-seeking can function like a compulsion because it attempts to reduce obsessional doubt.
Overt compulsions
An overt compulsion is visible to other people.
Examples include:
Washing.
Checking.
Arranging.
Repeating a movement.
Seeking reassurance.
These are clearly behavioural because an observer may see them.
Covert compulsions
Some compulsions are mental acts and cannot be observed directly.
Examples might include:
Counting silently.
Repeating a word internally.
Mentally reviewing an event.
Following an internal sequence.
These may also be described as cognitive strategies used to deal with obsessions.
This means that the division between behavioural and cognitive characteristics is useful but not always perfectly neat.
In an examination, classify the exact evidence given:
Visible repeated checking is behavioural.
Silently repeating a phrase to neutralise a thought is a cognitive coping strategy or mental compulsion.
Avoidance
What is avoidance?
Avoidance occurs when a person stays away from objects, places or situations that may trigger an obsession.
For example, somebody concerned about contamination may avoid:
Public toilets.
Door handles.
Public transport.
Shaking hands.
Shared equipment.
Crowded spaces.
A person worried about causing harm may avoid:
Cooking.
Driving.
Looking after another person.
Using particular objects.
Situations in which they feel responsible for safety.
Avoidance may reduce immediate anxiety
Avoidance can prevent the obsession from being triggered in the short term.
For example:
A person believes public transport is contaminated.
They avoid travelling.
Their immediate anxiety decreases.
They become increasingly dependent on avoidance.
Their ordinary life becomes more restricted.
Avoidance may be difficult to notice
The person may develop routines that hide the avoidance.
For example, they may:
Work from home.
Take a long route to avoid a particular place.
Ask other people to touch objects for them.
Decline invitations without explaining why.
Avoid cooking by buying prepared food.
The person may appear to have made an ordinary lifestyle choice, but the behaviour may be organised around preventing obsessional distress.
Avoidance compared with compulsion
Avoidance | Compulsion |
Prevents or reduces contact with a trigger | Occurs in response to an obsession or trigger |
The person stays away or escapes | The person performs a repeated action |
Example: avoiding public transport | Example: washing after using public transport |
Example: refusing to use an appliance | Example: checking the appliance repeatedly |
The same person may display both.
Summary of behavioural characteristics
Behavioural characteristic | Description | Example |
Compulsive behaviour | Repetitive actions performed to reduce anxiety or prevent a feared event | Checking a lock repeatedly |
Ritualised behaviour | Actions completed according to rigid rules or sequences | Washing in a fixed order |
Reassurance-seeking | Repeatedly asking others to confirm that everything is safe | Asking whether an appliance is switched off |
Avoidance | Staying away from situations that trigger obsessive thoughts | Avoiding shared objects because of contamination fears |
Emotional characteristics of OCD
The main emotional characteristics include:
Anxiety and distress.
Low mood.
Guilt.
Self-loathing or disgust.
Anxiety and distress
Obsessions produce anxiety
Obsessive thoughts may create intense anxiety.
A person may worry that:
Contamination will cause illness.
A mistake will lead to harm.
They have failed to complete a task safely.
They may lose control.
A feared event will happen unless a ritual is completed.
The thought may feel urgent even when the person recognises that it is unreasonable.
Anxiety may increase when compulsions are prevented
If the person cannot complete the ritual, anxiety may become stronger.
For example, somebody prevented from checking a door might experience:
Severe doubt.
Restlessness.
Panic.
An overwhelming urge to return.
Difficulty concentrating on anything else.
Anxiety may occur before a trigger
A person may experience anticipatory anxiety because they expect to encounter the source of an obsession.
For example, they may feel anxious before:
Leaving home.
Entering a public building.
Using shared equipment.
Completing a journey.
Going to bed without checking.
Distress caused by the thoughts themselves
Obsessions may cause distress because the person does not want to have them.
They may feel upset that:
The thoughts keep returning.
They cannot control their attention.
The content of the thoughts conflicts with their values.
The rituals are taking over ordinary life.
Other people do not understand the experience.
Anxiety is emotional
Anxiety belongs in the emotional category because it is a feeling.
However, recognising that the anxiety is excessive is cognitive because it involves insight.
This distinction has been important in AQA examinations.
Low mood
How OCD may affect mood
The persistent cycle of obsessions and compulsions can contribute to low mood.
A person may feel:
Sad.
Hopeless.
Exhausted.
Frustrated.
Emotionally overwhelmed.
Low mood may develop because:
Rituals take up substantial time.
Everyday activities become restricted.
Relationships become difficult.
The person feels unable to control their thoughts.
Previous attempts to resist compulsions have been unsuccessful.
OCD and depression are not identical
Low mood can be an emotional characteristic of OCD.
However, OCD and depression remain different disorders.
The person’s low mood may occur alongside:
Obsessions.
Compulsions.
Anxiety.
Avoidance.
The broader behavioural, emotional and cognitive profile of depression includes its own characteristic pattern.
Example
Elena spends several hours each day checking household items.
She feels increasingly hopeless because she cannot complete ordinary activities without performing the ritual.
The hopelessness and lowered mood are emotional characteristics.
The checking is behavioural.
Guilt
Why guilt may occur
A person may feel guilty because of the content of an obsession.
For example, they might believe that:
Having a thought makes them responsible for it.
Failing to complete a ritual could cause harm.
They should be able to control their thoughts.
Their behaviour is placing pressure on family members.
An ordinary mistake has endangered somebody.
Feeling responsible
A person may experience an exaggerated feeling of responsibility.
They might think:
“If I do not check again and something goes wrong, it will be entirely my fault.”
The belief about responsibility is cognitive.
The guilt connected with that belief is emotional.
Guilt despite no harmful action
The individual may feel guilty about a thought even though:
They did not choose it.
They did not act on it.
The thought does not reflect their values.
No harm occurred.
The emotional response may therefore be disproportionate to the person’s actual responsibility.
Self-loathing and disgust
What is self-loathing?
Self-loathing is an intense feeling of dislike or disgust directed towards oneself.
A person may feel:
Ashamed of having obsessive thoughts.
Disgusted by what enters their mind.
Angry that they cannot resist the compulsion.
Inferior to other people.
Unworthy because of their symptoms.
Disgust linked with contamination
Disgust may also be directed towards the perceived source of contamination.
For example, a person might experience intense disgust after touching:
A shared surface.
An object they believe is unclean.
Something associated with illness.
The disgust may contribute to repeated washing or avoidance.
Emotional rather than cognitive
Feeling disgusted with oneself is emotional.
Thinking:
“Having this thought proves I am a terrible person”
is cognitive.
The two often occur together but should be classified separately.
Official emotional characteristics
AQA’s June 2024 mark scheme identified low mood and self-loathing as emotional characteristics of OCD.
Summary of emotional characteristics
Emotional characteristic | Description | Example |
Anxiety | Intense worry or fear caused by an obsession or inability to complete a ritual | Feeling terrified that a door has been left unlocked |
Distress | Emotional suffering caused by intrusive thoughts or compulsive behaviour | Becoming overwhelmed by recurring thoughts |
Low mood | Persistent sadness or hopelessness associated with the disorder | Feeling hopeless about controlling the rituals |
Guilt | Feeling responsible for a thought or feared outcome | Feeling guilty for not checking again |
Self-loathing | Strong dislike or disgust directed towards oneself | Feeling disgusted by having an intrusive thought |
Cognitive characteristics of OCD
The main cognitive characteristics include:
Obsessive thoughts.
Selective attention and hypervigilance.
Cognitive coping strategies.
Insight into the irrationality of thoughts and behaviour.
Official AQA marking guidance has credited all four as cognitive characteristics.
Obsessive thoughts
Persistent and intrusive thoughts
Obsessive thoughts repeatedly enter the person’s awareness.
They may be:
Difficult to control.
Difficult to dismiss.
Unwanted.
Distressing.
Repetitive.
Triggered by particular situations.
The person may attempt to ignore or suppress them, but they return.
Thoughts, images and impulses
Obsessions do not have to appear only as sentences.
They may take the form of:
Thoughts.
Images.
Doubts.
Impulses.
Mental pictures.
Urgent questions.
Examples include:
“What if the door is unlocked?”
An image of somebody being harmed.
Doubt about whether an appliance was switched off.
The thought that an ordinary surface is dangerous.
A sense that objects are arranged incorrectly.
Doubt
Repeated doubt is common in obsessive thinking.
The person may have checked something and still think:
“What if I checked the wrong item?”
“What if I only imagined checking?”
“What if it became unsafe afterwards?”
“What if I did not check carefully enough?”
Further checking may provide only temporary certainty.
Intrusive does not mean intentional
An intrusive thought enters awareness without being deliberately chosen.
The person does not necessarily agree with it or want it.
A thought’s presence does not show that the person intends to act upon it.
Ordinary intrusive thoughts compared with obsessions
Many people experience unwanted thoughts occasionally.
An obsession is more likely to be:
Persistent.
Recurrent.
Highly distressing.
Difficult to dismiss.
Connected with compulsions.
Interfering with ordinary life.
A single unusual thought does not establish OCD.
Selective attention and hypervigilance
Selective attention
Selective attention occurs when the person focuses strongly on information connected with the obsession.
For example, somebody worried about contamination may notice:
Marks on surfaces.
Other people coughing.
Objects that have been touched.
Possible sources of dirt.
Opportunities for handwashing.
They may find it difficult to focus on evidence that the environment is safe.
Hypervigilance
Hypervigilance means being constantly alert for the source of a feared problem.
The person may:
Scan the environment.
Monitor their own actions.
Watch other people closely.
Check continuously for possible danger.
Notice obsession-related information very quickly.
Example
During a lesson, Beth is unable to concentrate because she continually watches which objects other students touch.
This may demonstrate:
Selective attention to possible contamination.
Hypervigilance for the source of the obsession.
Poorer concentration on the lesson as a consequence.
Attention can strengthen the obsession
Constantly looking for threat-related information may make the feared problem seem more likely.
For example:
The person expects contamination.
They search for possible evidence of dirt.
They notice every mark or cough.
The environment appears increasingly dangerous.
The obsession becomes more difficult to dismiss.
For this lesson, the important point is that the person’s attention is biased towards the source of the obsession.
Cognitive coping strategies
What is a cognitive coping strategy?
A cognitive coping strategy is a mental action used to manage, neutralise or reduce an obsessive thought.
Examples may include:
Counting mentally.
Repeating a phrase.
Replacing a feared image with another image.
Mentally reviewing whether an action was completed.
Reassuring oneself repeatedly.
Trying to suppress the obsession.
Following an internal sequence.
Mental rituals
A mental ritual may function like a visible compulsion.
For example:
The person experiences an intrusive thought.
Anxiety rises.
They count to a particular number in their head.
Anxiety falls temporarily.
The ritual is repeated when the thought returns.
The counting is not observable, but it is still a repetitive response to the obsession.
Thought suppression
The person may attempt not to think about the obsession.
However, trying to suppress a thought requires monitoring whether it is occurring.
This can keep attention focused on the unwanted thought.
For example:
“I must not think about contamination.”
The person must continue checking whether contamination is in their thoughts, which may make the thought more noticeable.
Reassurance as a cognitive strategy
The person may repeatedly seek certainty from themselves or other people.
For example:
Reviewing an event mentally.
Asking whether they have done something wrong.
Trying to reach complete certainty.
The strategy may reduce doubt briefly without preventing it from returning.
Insight into irrationality
What is insight?
Insight is awareness that thoughts or behaviours may be excessive, unreasonable or irrational.
A person with OCD may recognise that:
The danger is exaggerated.
The compulsion is not realistically necessary.
Other people do not respond in the same way.
The ritual takes up too much time.
The feared outcome is unlikely.
Despite this understanding, they may still feel unable to stop.
Knowing does not remove anxiety
A person might say:
“I know the door is probably locked, but I still feel that I must check again.”
This demonstrates both:
Cognitive insight into the irrationality of the behaviour.
Emotional anxiety that remains despite the insight.
Insight is cognitive, not emotional
The phrase “insight into excessive anxiety” may contain the word anxiety.
However:
The anxiety itself is emotional.
Awareness that the anxiety is excessive is cognitive.
This distinction was a specific source of confusion in the June 2024 examination report.
Levels of insight may differ
Not every person has the same degree of insight.
One individual may clearly recognise that the ritual is excessive.
Another may remain much more convinced that the feared outcome is realistic.
In an application question, use only the level of insight described in the scenario.
Summary of cognitive characteristics
Cognitive characteristic | Description | Example |
Obsessive thoughts | Recurrent, intrusive and distressing thoughts, images or impulses | Persistent fear that an appliance is unsafe |
Selective attention | Focusing disproportionately on information linked to the obsession | Noticing every potentially contaminated object |
Hypervigilance | Constantly monitoring for the source of a feared problem | Repeatedly scanning a room for contamination |
Cognitive coping strategies | Mental actions used to reduce or neutralise an obsession | Counting or repeating a phrase mentally |
Insight | Awareness that thoughts or behaviours are excessive or irrational | Knowing that repeated checking is unnecessary |
Complete comparison of OCD characteristics
Behavioural | Emotional | Cognitive |
Compulsive behaviour | Anxiety | Obsessive thoughts |
Ritualised actions | Distress | Selective attention |
Reassurance-seeking | Low mood | Hypervigilance |
Avoidance | Guilt | Cognitive coping strategies |
Self-loathing or disgust | Insight into irrationality |
Distinguishing obsessions from compulsions
Obsessions are not simply strong preferences
A person may strongly prefer:
A tidy room.
A particular routine.
Objects arranged in a certain way.
This does not automatically mean that they have an obsession.
An obsession involves an intrusive cognitive experience that is:
Recurring.
Unwanted.
Difficult to dismiss.
Distressing.
Compulsions are not simply habits
A habit may be:
Convenient.
Enjoyable.
Flexible.
Easy to delay.
Unconnected with severe anxiety.
A compulsion is more likely to be:
Driven by an urge.
Difficult to resist.
Repetitive.
Completed according to rigid rules.
Connected with an obsession or feared consequence.
Distressing if interrupted.
Routine compared with compulsion
Ordinary routine | Compulsion |
Usually flexible | Often rigid |
Can normally be delayed | Difficult to resist |
Does not create severe anxiety if interrupted | Interruption may produce intense anxiety |
May be enjoyable or convenient | Usually performed to reduce distress |
Does not dominate daily life | May be highly time-consuming |
Obsession and compulsion do not always match logically
A person may perform a ritual that appears unrelated to the feared event.
For example, they may believe:
“Unless I repeat this movement, something bad will happen.”
The action does not realistically prevent the event, but the person feels driven to complete it.
A person may mainly display obsessions
Some individuals may experience highly distressing obsessive thoughts without obvious visible compulsions.
Their responses may involve:
Mental rituals.
Internal reassurance.
Thought suppression.
Mental checking.
An observer might therefore underestimate the severity of the symptoms.
How the three categories interact
Contamination example
Cognitive: “This surface is contaminated.”
Emotional: The person feels anxiety and disgust.
Behavioural: They wash repeatedly.
Emotional: Anxiety decreases temporarily.
Cognitive: Doubt returns.
Behavioural: The ritual is repeated.
Checking example
Cognitive: “What if I left the door unlocked?”
Emotional: The person feels anxiety and guilt about possible harm.
Behavioural: They check the lock.
Cognitive: They doubt whether they checked correctly.
Behavioural: They return to check again.
Symmetry example
Cognitive: The person believes that objects are not arranged correctly.
Emotional: They experience intense discomfort or distress.
Behavioural: They reorder the objects repeatedly.
Emotional: The discomfort falls briefly.
Responsibility example
Cognitive: The person believes that failing to perform a ritual will cause harm.
Emotional: They feel anxiety and guilt.
Behavioural: They complete the ritual.
Cognitive: They remain uncertain whether it was completed properly.
Applying the characteristics to unfamiliar scenarios
Scenario 1: repeated checking
Marcus checks the cooker before leaving home.
After walking down the road, he begins thinking that he may have checked it incorrectly. He returns home several times and feels extremely anxious whenever he tries to resist.
The characteristics are:
Obsession: recurring doubt that the cooker is unsafe.
Compulsion: returning to check repeatedly.
Anxiety: distress when trying to resist.
Insight, if Marcus recognises that the repeated checking is excessive.
Scenario 2: contamination
Nadia believes that objects touched by other people may be contaminated.
She watches carefully to see who touches each object, avoids public transport and washes her hands repeatedly after leaving home.
The characteristics are:
Obsessive thought: fear of contamination.
Selective attention: watching which objects other people touch.
Avoidance: refusing to use public transport.
Compulsion: repeated washing.
Anxiety or disgust: if these feelings are described.
Scenario 3: mental ritual
Whenever an unwanted thought enters Aaron’s mind, he silently counts backwards in a fixed pattern.
He knows that counting cannot realistically prevent harm but feels unable to stop.
The characteristics are:
Obsession: the recurring unwanted thought.
Cognitive coping strategy or mental compulsion: counting silently.
Insight: recognising that the ritual cannot prevent harm.
Anxiety: implied only if the scenario says that the thought produces distress.
Scenario 4: reassurance-seeking
Poppy repeatedly asks her family whether she has offended anybody.
Their reassurance helps briefly, but the doubt returns and she asks again.
The characteristics are:
Obsession: recurring doubt about causing offence.
Compulsive reassurance-seeking: repeatedly asking the family.
Temporary anxiety reduction: reassurance helps only briefly.
Possible guilt: if Poppy feels responsible for causing harm.
Scenario 5: self-loathing
Elliot experiences intrusive thoughts that conflict with his values.
He knows that he did not choose the thoughts, but he feels disgusted with himself for having them.
The characteristics are:
Obsessive thoughts: intrusive, unwanted cognition.
Insight: awareness that the thoughts are unwanted.
Self-loathing: disgust directed towards himself.
Distress: emotional suffering caused by the obsession.
Scenario 6: avoidance without visible ritual
Leah avoids using kitchens because she fears that she might accidentally cause a fire.
She asks other people to prepare all her food.
This demonstrates:
Obsessive fear or doubt: causing a fire.
Avoidance: staying out of kitchens.
Reliance on others: asking them to complete the avoided activity.
The scenario does not provide evidence of repeated checking unless it is explicitly stated.
Scenario 7: low mood
Rory’s rituals take several hours each day.
He has stopped seeing friends and feels increasingly hopeless because he cannot control the behaviour.
The characteristics are:
Compulsive behaviour: time-consuming rituals.
Social avoidance or withdrawal: no longer seeing friends.
Low mood: feeling hopeless.
Insight: recognising difficulty controlling the behaviour.
A step-by-step application method
Step 1: Find the recurring thought
Ask:
What thought, image, impulse or doubt keeps returning?
This identifies the obsession.
Step 2: Find the repeated action
Ask:
What does the person repeatedly do in response?
This identifies the compulsion.
Step 3: Find the emotion
Look for:
Anxiety.
Distress.
Low mood.
Guilt.
Self-loathing.
Disgust.
Step 4: Find the cognitive process
Look for:
Intrusive thoughts.
Selective attention.
Hypervigilance.
Mental coping strategies.
Awareness that the behaviour is irrational.
Step 5: explain the relationship
A strong application may show how one characteristic leads to another.
For example:
Isla’s recurring doubt that the door is unlocked is an obsession. She responds by repeatedly checking the lock, which is a compulsion intended to reduce the anxiety caused by the obsession.
Strong and weak application
Weak application
Finn has OCD because he checks things.
This answer:
Does not identify an obsession.
Does not explain why the checking is compulsive.
Makes a diagnosis from limited evidence.
Does not use the full scenario.
Stronger application
Finn’s recurring thought that the window may be open is an obsession because it is intrusive and repeatedly returns. His repeated checking is a compulsion because he feels driven to perform it to reduce his anxiety.
Observable and unobservable characteristics
Observable characteristics
An observer may see:
Repeated washing.
Repeated checking.
Arranging objects.
Avoidance.
Reassurance-seeking.
Ritualised movement.
Unobservable characteristics
Other experiences may be known only through self-report:
Intrusive thoughts.
Anxiety.
Guilt.
Mental rituals.
Selective attention.
Insight.
Self-loathing.
This means that outward behaviour may not reveal the full extent of OCD.
A person may complete mental compulsions without anybody else noticing.
OCD and everyday functioning
The characteristics may interfere with:
Leaving home.
Arriving on time.
Sleeping.
Studying.
Working.
Using public spaces.
Maintaining relationships.
Completing personal care.
Making ordinary decisions.
For example:
Characteristic | Possible effect |
Repeated checking | The person becomes persistently late |
Washing rituals | Personal care takes several hours |
Avoidance | Travel and social activities become restricted |
Intrusive thoughts | Concentration becomes difficult |
Reassurance-seeking | Relationships become strained |
Low mood | Motivation and participation decline |
The level of practical interference may be considered through failure to function adequately.
However, a characteristics question should remain focused on the actions, emotions and thoughts described.
Distinguishing OCD from phobias
OCD and phobias may both involve:
Anxiety.
Avoidance.
Selective attention.
Distressing beliefs.
However, the pattern differs.
OCD | Phobias |
Obsessions are recurring intrusive thoughts | Fear is focused on a phobic object or situation |
Compulsions are performed to reduce obsessional anxiety | Avoidance, endurance and panic are central behavioural features |
Repeated doubt and rituals are common | Disproportionate fear is central |
The person may attempt to neutralise a thought | The person often escapes or avoids the feared stimulus |
The phobic pattern is covered in the behavioural, emotional and cognitive characteristics of phobias.
Distinguishing OCD from depression
OCD and depression may both include:
Low mood.
Guilt.
Reduced functioning.
Negative thinking.
Social withdrawal.
However:
OCD | Depression |
Intrusive obsessions are central | Lowered mood is central |
Compulsive rituals may occur | Reduced activity or agitation may occur |
Selective attention focuses on the obsession | Dwelling focuses on negative experiences |
Insight may concern the irrationality of rituals | Absolutist thinking concerns rigid negative conclusions |
Anxiety is often linked to preventing a feared event | Worthlessness and hopelessness may be prominent |
Answering description questions
Two-mark question
For two marks, give:
A named characteristic.
A clear description or example.
For example:
One cognitive characteristic is an obsessive thought. This is a persistent and intrusive thought, image or impulse that repeatedly enters awareness and causes distress.
Four-mark question
A four-mark question may ask for two characteristics.
For each characteristic:
Name it.
Explain it.
For example:
One cognitive characteristic is selective attention, in which the person focuses strongly on the source of the obsession. Another is insight, where the person recognises that their thoughts or compulsive behaviour are excessive or irrational.
Six-mark question
A six-mark response may require coverage of all three categories.
A useful structure is:
One developed behavioural characteristic.
One developed emotional characteristic.
One developed cognitive characteristic.
Additional accurate detail where space allows.
Distinguish questions
The command word distinguish requires a direct difference.
Use comparative language such as:
Whereas.
In contrast.
Unlike.
An obsession is…, while a compulsion is…
Two separate descriptions may not make the distinction sufficiently clear.
Key Words 🔑
Key word | Student-friendly definition | How it may be used in an exam |
Obsessive-compulsive disorder | A disorder involving intrusive obsessions and repetitive compulsions. | Introduce the behavioural, emotional and cognitive pattern. |
Obsession | A recurring, intrusive and unwanted thought, image or impulse. | Identify the central cognitive characteristic. |
Compulsion | A repetitive behaviour or mental act performed to reduce anxiety or prevent a feared event. | Identify the central behavioural characteristic. |
Intrusive thought | A thought that enters awareness without being deliberately chosen. | Explain why obsessions are distressing. |
Compulsive behaviour | Repetitive action that the person feels driven to perform. | Apply repeated checking or washing. |
Ritual | An action or mental process completed according to rigid rules. | Explain fixed sequences or repeated actions. |
Avoidance | Staying away from situations that may trigger an obsession. | Apply refusal to touch or enter a particular setting. |
Reassurance-seeking | Repeatedly asking for confirmation that everything is safe or correct. | Identify a possible compulsion. |
Anxiety | An unpleasant emotional state involving fear, worry and tension. | Explain the emotional effect of obsessions. |
Distress | Significant emotional suffering. | Describe the impact of intrusive thoughts. |
Low mood | Persistent sadness or hopelessness. | Identify an emotional characteristic. |
Guilt | Feeling responsible for a thought or feared outcome. | Explain emotional responses to obsessions. |
Self-loathing | Strong dislike or disgust directed towards oneself. | Identify an emotional characteristic recognised by AQA. |
Selective attention | Focusing strongly on information connected with the obsession. | Apply monitoring of contamination or danger. |
Hypervigilance | Remaining constantly alert for a possible threat or trigger. | Explain scanning and monitoring behaviour. |
Cognitive coping strategy | A mental process used to reduce or neutralise an obsession. | Apply counting, repeating or mental checking. |
Insight | Awareness that thoughts or behaviour may be excessive or irrational. | Distinguish cognition from anxiety. |
Mental compulsion | A repetitive mental act performed to reduce distress. | Explain compulsions that cannot be observed. |
Hints from the Examiner Reports 💡
Examiner hint: Keep behavioural, emotional and cognitive characteristics separate. Ask whether the evidence describes an action, a feeling or a thought.
Examiner hint: Compulsive behaviour is behavioural. It should not be given as a cognitive characteristic merely because it is caused by a thought.
Examiner hint: Anxiety is emotional. Insight into the excessive nature of that anxiety is cognitive.
Examiner hint: Low mood and self-loathing are emotional characteristics of OCD. Students found the second of these particularly difficult to identify in the June 2024 examination.
Examiner hint: Learn more than one cognitive characteristic. In the November 2020 examination, many students could describe obsessive thoughts but struggled to provide a second cognitive feature.
Examiner hint: Creditworthy cognitive characteristics include intrusive obsessive thoughts, selective attention or hypervigilance, insight and cognitive strategies for dealing with obsessions.
Examiner hint: Do not drift into non-cognitive material. The November 2020 report noted that students sometimes wrote about compulsive behaviour or anxiety when asked specifically for cognitive characteristics.
Examiner hint: Naming a term alone may gain limited credit. Explain what the characteristic involves.
Examiner hint: When asked to distinguish obsessions and compulsions, make the difference explicit. State that one is an intrusive cognition and the other is a repeated response intended to reduce distress.
Common Mistakes ⚠️
Mistake: Saying an obsession is a repeated action
Why this is incorrect:
An obsession is a recurring thought, image or impulse.
How to improve:
Classify the repeated action as a compulsion.
Mistake: Saying a compulsion is simply a strong thought
Why this is incorrect:
A compulsion is an action or mental ritual performed in response to an obsession.
How to improve:
Explain what the person does to reduce anxiety.
Mistake: Describing obsessions and compulsions separately without comparing them
Why this may not answer “distinguish”:
The difference has not been made explicit.
How to improve:
Use “whereas” or “in contrast”.
Mistake: Classifying anxiety as cognitive
Why this is incorrect:
Anxiety is an emotional state.
How to improve:
Classify the awareness that anxiety is excessive as cognitive insight.
Mistake: Classifying insight as emotional
Why this is incorrect:
Insight involves understanding or awareness.
How to improve:
Place it in the cognitive category.
Mistake: Forgetting low mood and self-loathing
Why this matters:
Both are emotional characteristics recognised in AQA assessment.
How to improve:
Revise more than anxiety alone.
Mistake: Saying every routine is a compulsion
Why this is incorrect:
Ordinary routines are usually flexible and do not produce severe anxiety if interrupted.
How to improve:
Explain the urge, repetition, rigidity and anxiety-reducing purpose.
Mistake: Saying compulsions are enjoyable
Why this is usually inaccurate:
They are commonly performed because the person feels driven to reduce distress.
How to improve:
Distinguish temporary relief from enjoyment.
Mistake: Assuming all compulsions are visible
Why this is incorrect:
Some involve mental counting, repeating or reviewing.
How to improve:
Recognise cognitive coping strategies and mental rituals.
Mistake: Treating every unwanted thought as an obsession
Why this is incorrect:
Occasional intrusive thoughts are common.
How to improve:
Refer to persistence, recurrence, distress and interference.
Mistake: Saying the obsession disappears permanently after the ritual
Why this is incorrect:
The reduction in anxiety is often temporary.
How to improve:
Explain that the thought or doubt may return.
Mistake: Assuming obsessive thoughts reflect the person’s intentions
Why this is incorrect:
Intrusive thoughts are unwanted and may conflict with the person’s values.
How to improve:
Separate having a thought from choosing or acting upon it.
Mistake: Describing only washing and cleaning
Why this is incomplete:
OCD may involve checking, ordering, reassurance, mental rituals and other forms of compulsion.
How to improve:
Learn a varied set of examples.
Mistake: Diagnosing OCD from one act of checking
Why this is too strong:
Checking once may be sensible.
How to improve:
Look for repetition, distress, intrusive doubt and difficulty resisting.
Mistake: Inventing a compulsion not stated in the scenario
Why this loses application credit:
Application must use the evidence provided.
How to improve:
Identify only the characteristics supported by the stem.
Mistake: Explaining genes, serotonin or brain structures
Why this is irrelevant to a characteristics question:
These are biological explanations.
How to improve:
Save them for the lessons on genetic and neural explanations.
Mistake: Describing drug therapy
Why this is irrelevant:
Drug therapy is a treatment rather than a characteristic.
How to improve:
Check the command word and topic before writing.
Exam-Style Questions ✍️
Question 1
Which one of the following is an emotional characteristic of obsessive-compulsive disorder?
A. Selective attention
B. Repeated checking
C. Self-loathing
D. Insight
[1 mark]
Question 2
Define an obsession.
[2 marks]
Question 3
Define a compulsion.
[2 marks]
Question 4
Distinguish between an obsession and a compulsion.
[4 marks]
Question 5
Outline two cognitive characteristics of obsessive-compulsive disorder.
[4 marks]
Question 6
Ella repeatedly thinks that her front door may be unlocked. Although she knows that this is unlikely, she returns home several times to check it.
Identify and explain two characteristics of OCD shown by Ella.
[4 marks]
Question 7
When using shared equipment, Hamza watches closely to see who touches each object. He later washes his hands repeatedly and becomes extremely anxious if he is prevented from doing so.
Identify one behavioural, one emotional and one cognitive characteristic shown by Hamza.
[6 marks]
Question 8
A student says:
“Insight is an emotional characteristic because it involves recognising excessive anxiety.”
Use your knowledge of OCD to explain why the student is incorrect.
[4 marks]
Question 9
Maya experiences an unwanted thought that something terrible will happen. She silently counts backwards in a fixed sequence until her distress decreases.
Explain the obsession and compulsion shown by Maya.
[4 marks]
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