What happens when you get caught up in your thoughts?
Unwanted thoughts are part of everyday life. Sometimes it is what we do after a thought appears — worrying, analysing, monitoring or checking — that keeps us feeling stuck.
Having a thought is not the same as engaging in worry or rumination. A thought can appear automatically. The extended thinking that follows is a process we can learn to change.
Choose a familiar experience to see one possible illustration of a thinking pattern, and what a different response might look like.
Everyone’s CAS is individual. People with the same difficulties may worry, ruminate, monitor threats or use coping behaviours in different ways. These patterns can also vary with the situation and change over time. The examples below are illustrations, not a standard CAS for any diagnosis. An individual CAS formulation is developed collaboratively in therapy.
Want to understand the model first? These brief explanations are optional. You can also go straight to the examples below.
What is the Cognitive Attentional Syndrome (CAS)?
The CAS is a pattern of responding to thoughts, feelings and experiences that can prolong distress. In Wells's model it involves three interconnected processes:
Extended worry about what might happen or rumination about what has happened or how you feel.
Repeatedly monitoring possible danger, symptoms, mistakes or negative reactions.
Strategies such as repeated checking, reassurance seeking, avoidance or thought suppression. Using alcohol or other drugs to manage or escape unwanted thoughts or feelings can also function as CAS coping.
These processes are often maintained by metacognitive beliefs about the value, danger or controllability of thinking.
Why do beliefs about thinking matter?
Positive metacognitive beliefs concern the supposed benefits of worrying, rumination or monitoring, such as “Worrying helps me prepare”.
Negative metacognitive beliefs concern the uncontrollability or danger of thinking, such as “Once I start worrying, I can't stop”.
MCT aims to change these beliefs and the CAS they help maintain. It does not rely on repeatedly debating the truth of each unwanted thought.
1. Choose an experience
2. How the thinking cycle can develop
One possible example of excessive worry — not a universal pattern or personal CAS formulation.
What if something goes wrong tomorrow?
Perceived benefit: “Worrying helps me prepare and prevents mistakes.”
Perceived uncontrollability or danger: “Once I start worrying, I can’t control it.”
Extended what-if worry, scanning for problems, repeated checking or reassurance seeking.
Possible threats stay prominent. Worry may feel increasingly difficult to stop, strengthening beliefs about its uncontrollability.
The consequences may reinforce the beliefs that keep the CAS going, making extended thinking or monitoring seem necessary.
A question to consider: If worry feels necessary to prepare, what might you learn by testing whether you can choose not to continue worrying?
3. What could responding differently look like?
Open both examples to compare continuing the thinking process with practising detached mindfulness (DM).
Getting caught up in the thought
A thought about tomorrow's meeting appears. You start running through everything that could go wrong, rehearsing responses and looking for certainty that you will cope.
Because another possibility always comes to mind, the worry continues. The effort to prepare becomes an extended thinking process rather than a specific action you need to take.
Practising detached mindfulness
The thought ‘What if something goes wrong tomorrow?’ appears. You recognise it as a thought and don't begin working through possible outcomes, testing whether it is true, or reassuring yourself.
You notice the thought and leave it alone, without checking whether it has disappeared. You can continue what you were doing, without needing an answer to the ‘what if’.
Important distinction: MCT distinguishes practical planning from repeated hypothetical worry. The aim is not to avoid necessary decisions.
2. How the thinking cycle can develop
One possible example of depression and low mood — not a universal pattern or personal CAS formulation.
Why am I feeling like this again?
Perceived benefit: “Going over how I feel will help me find an explanation and get better.”
Perceived uncontrollability or danger: “I can’t stop dwelling on my feelings and mistakes.”
Depressive rumination, self-focused attention, reviewing causes and consequences, and unhelpful withdrawal.
Repeated analysis sustains negative self-focus and can make it harder to engage flexibly with ordinary activities.
The consequences may reinforce the beliefs that keep the CAS going, making extended thinking or monitoring seem necessary.
A question to consider: If analysing your mood seems necessary to understand it, what might you discover by leaving a question about your feelings unanswered?
3. What could responding differently look like?
Open both examples to compare continuing the thinking process with practising detached mindfulness (DM).
Getting caught up in the thought
You notice a dip in mood and start asking why it has happened, what it says about you, and whether you will always feel this way.
You revisit past disappointments and compare yourself with how you think you should be feeling. The questioning continues, even though it produces few useful answers.
Practising detached mindfulness
‘Why am I feeling like this again?’ appears. Rather than analysing your mood or searching your past for an explanation, you notice the question without taking up the task of answering it.
Your mood doesn't have to change first. You can leave the question unanswered and stay engaged in what you were doing, without checking whether you feel better.
Important distinction: MCT targets rumination and the beliefs that keep it going, rather than debating whether negative thoughts are accurate.
2. How the thinking cycle can develop
One possible example of health anxiety — not a universal pattern or personal CAS formulation.
What if this sensation means something serious?
Perceived benefit: “Monitoring and thinking through symptoms will help me stay safe.”
Perceived uncontrollability or danger: “If I start worrying about my health, I can’t stop.”
Health-related worry, repeated symptom monitoring, checking, searching and reassurance seeking.
More attention is allocated to sensations and possible illness, which can maintain a sense of threat and uncertainty.
The consequences may reinforce the beliefs that keep the CAS going, making extended thinking or monitoring seem necessary.
A question to consider: If repeatedly checking your symptoms feels necessary to keep you safe, what might you discover by reducing unnecessary checking while continuing to follow appropriate medical advice?
3. What could responding differently look like?
Open both examples to compare continuing the thinking process with practising detached mindfulness (DM).
Getting caught up in the thought
You notice a sensation and begin checking it, searching for explanations, comparing symptoms and seeking reassurance.
Even after finding an answer, another doubt appears. Your attention stays on the sensation and the possibility of illness, rather than settling an appropriate practical question.
Practising detached mindfulness
The thought ‘What if this is serious?’ appears. You recognise it without beginning another cycle of mental investigation, body scanning or reassurance seeking solely to settle the worry.
You don't need to argue that the thought is false, make the sensation disappear or check repeatedly whether you're calm. You can leave further worry alone while still making appropriate healthcare decisions when needed.
Important distinction: Detached mindfulness does not replace medical assessment, treatment or responding to new or concerning symptoms.
2. How the thinking cycle can develop
One possible example of PTSD and traumatic stress — not a universal pattern or personal CAS formulation.
What if something like that happens again?
Perceived benefit: “Staying alert and reviewing what happened will help me prevent future danger.”
Perceived uncontrollability or danger: “My thoughts or memories feel impossible to control, or dangerous to experience.”
Threat monitoring, worry about future danger, rumination about the event or its meaning, and counterproductive attempts to control memories.
Processing remains oriented towards threat. This can interfere with a more flexible response to reminders and memories.
The consequences may reinforce the beliefs that keep the CAS going, making extended thinking or monitoring seem necessary.
A question to consider: If reviewing the trauma or staying constantly alert feels protective, what might you learn about those beliefs through an individually guided MCT experiment?
3. What could responding differently look like?
Open both examples to compare continuing the thinking process with practising detached mindfulness (DM).
Getting caught up in the thought
A reminder of trauma appears. You start scanning for danger, replaying parts of the event, asking why it happened or mentally checking what you could have done differently.
You may also try hard to block thoughts or memories. These repeated responses can keep attention fixed on threat, even when the present situation is safe.
Practising detached mindfulness
A trauma-related thought or memory comes to mind in a safe situation. You recognise it as a mental event and don't deliberately replay it, analyse its meaning, test your memory or try to push it away.
You do not have to make the memory disappear. You leave the thought or memory alone without adding further worry, rumination or monitoring, while remaining responsive to what is actually happening around you.
Important distinction: This illustrates one part of Wells and Sembi’s PTSD model; trauma treatment needs individual clinical assessment. Respond to genuine present danger as appropriate.
2. How the thinking cycle can develop
One possible example of performance anxiety — not a universal pattern or personal CAS formulation.
What if I freeze during the presentation?
Perceived benefit: “Repeated rehearsal and self-checking will stop me making mistakes.”
Perceived uncontrollability or danger: “Once I start worrying about performing, I can’t switch it off.”
Anticipatory worry, excessive mental rehearsal, self-monitoring and post-performance rumination.
Attention shifts towards possible errors or anxiety symptoms rather than the performance itself, reinforcing doubts afterwards.
The consequences may reinforce the beliefs that keep the CAS going, making extended thinking or monitoring seem necessary.
A question to consider: If repeatedly rehearsing mistakes feels essential, what might you learn by preparing appropriately and then leaving the “what if” thoughts alone?
3. What could responding differently look like?
Open both examples to compare continuing the thinking process with practising detached mindfulness (DM).
Getting caught up in the thought
Before presenting, you mentally run through ways you might fail, rehearsing well beyond useful preparation.
While speaking, you check your voice and how anxious you seem. Afterwards, you replay small errors, looking for proof that you performed badly.
Practising detached mindfulness
‘What if I freeze?’ appears. You notice the thought and leave it alone without answering it or using another round of mental rehearsal to neutralise it.
You can undertake normal preparation and then give attention to the actual task. If thoughts about errors arise during or after it, you leave them without extended analysis, even if you still feel nervous.
Important distinction: Useful preparation and learning from feedback are different from repetitive worry or post-event rumination.
2. How the thinking cycle can develop
One possible example of stress and burnout — not a universal pattern or personal CAS formulation.
What if I can’t keep up with everything?
Perceived benefit: “If I keep going over everything, I’ll stay on top of it.”
Perceived uncontrollability or danger: “I can’t switch off the thinking about work.”
Prolonged work-related worry, mental reviewing, threat monitoring and repeated checking.
Work demands continue to occupy attention outside work, adding to a sense of pressure and reducing mental flexibility.
The consequences may reinforce the beliefs that keep the CAS going, making extended thinking or monitoring seem necessary.
A question to consider: If mentally reviewing work seems necessary to stay on top of things, what might you discover by separating useful action from repeated worry?
3. What could responding differently look like?
Open both examples to compare continuing the thinking process with practising detached mindfulness (DM).
Getting caught up in the thought
You finish work but continue mentally revisiting tasks, imagining tomorrow's problems and checking whether you've forgotten something.
You try to solve everything in your head, even when no useful action can be taken. The working day ends, but the worry process doesn't.
Practising detached mindfulness
‘What if I forgot something?’ appears after work. You notice it without starting another round of mental checking or hypothetical problem-solving.
If a concrete issue needs action, you can address it at an appropriate time. Otherwise, you leave the thought alone and remain involved in what you're doing, without checking whether your mind has switched off.
Important distinction: MCT can address repetitive thinking, but genuine excessive workload, lack of rest or unsafe working conditions may also require practical changes.
The principle behind MCT
Detached mindfulness means recognising thoughts as mental events without adding extended analysis, worry, reassurance, suppression or attempts to change their content. It is not meditation, forced positive thinking, a relaxation exercise or a way to make thoughts disappear.
MCT, developed by Professor Adrian Wells, aims to reduce the CAS and change the beliefs about thinking that maintain it. Techniques can include detached mindfulness, worry or rumination postponement, attention training and behavioural experiments targeting metacognitive beliefs.
You don’t have to control every thought that appears. The focus is on changing how you respond to it.
Common questions
Is detached mindfulness the same as ignoring or suppressing thoughts?
No. Detached mindfulness means noticing a thought without trying to push it away, argue with it, change it or keep analysing it. The aim isn't to get rid of the thought or feel better immediately; it's to relate differently to thinking.
Does MCT mean I should never think about problems?
No. Practical planning, problem-solving and decision-making remain important. MCT targets repetitive worry, rumination, threat monitoring and coping responses that continue beyond what is useful.
Further reading
For more information about the clinical model:
- Metacognitive Therapy Institute — How MCT works
- Wells, A. (2009). Metacognitive Therapy for Anxiety and Depression. Guilford Press. Publisher information
If these patterns seem familiar, you can read more about MCT and how to enquire about therapy on our main website.
Learn more about MCT & enquire about therapy →
Educational illustrations only. CAS patterns differ between people and can change across situations and over time. These examples are not diagnostic templates, individual formulations, treatment plans or replacements for appropriate medical or psychological care. This feature does not collect or transmit responses.