The Cognitive Approach to Depression

The cognitive approach explains depression as the result of faulty, negative thinking. Its central claim is that our emotions are shaped not by events themselves, but by how we interpret those events. Two people can face the same setback — losing a job, failing an exam — yet one recovers while the other becomes depressed. The difference lies in the thoughts each has about what happened.

This makes the approach distinctive. It does not look for a chemical imbalance or a childhood conflict; it looks at the beliefs, assumptions and thinking styles a person applies to their experiences. Because thinking can be examined and changed, the approach leads directly to a talking treatment: change the faulty thoughts and you change the depression.

You need two named explanations for the exam:

Explanation	Psychologist	Core idea
Cognitive theory of depression	Aaron Beck (1967)	Depression comes from negative self-schemas and the negative triad
ABC model	Albert Ellis (1962)	Depression comes from irrational beliefs about events

The cognitive approach assumes it is the interpretation of an event, not the event itself, that determines how we feel. This one idea underpins both Beck's and Ellis's theories.

Beck (1967) argued that some people are more vulnerable to depression because of the way they think. He identified three cognitive factors, and you should be able to name and explain all three.

1. Faulty information processing. When depressed, people attend selectively to the negative aspects of a situation and ignore the positives. They also think in absolutist, black-and-white terms — a single mistake becomes proof of total failure. A student who scores 90% fixates on the 10% they lost.

2. Negative self-schemas. A schema is a package of ideas and information developed through experience. A negative self-schema is a set of negative beliefs and expectations about oneself, often acquired in childhood (for example through criticism or loss). Once formed, it biases how the person interprets all new experiences, so everything is read as further evidence of their own worthlessness.

3. The negative triad — covered in full on the next slide.

Factor	What the depressed person does
Faulty information processing	Focuses on negatives; thinks in all-or-nothing terms
Negative self-schema	Interprets all new information through a negative view of the self
Negative triad	Holds automatic negative thoughts about self, world and future

A schema acts like a mental filter. A negative self-schema filters every experience so that even neutral or positive events are read as confirming the person's low opinion of themselves.

At the heart of Beck's theory is the negative triad: three types of automatic negative thought that a depressed person cannot easily switch off. "Automatic" means the thoughts appear without effort or choice, and they reinforce one another to maintain the depression.

Part of the triad	Automatic negative thought
The self	"I am worthless and a failure."
The world	"Everything and everyone is against me."
The future	"Nothing will ever get better."

These thoughts feed each other: seeing the self as worthless makes the world look hostile, which makes the future look hopeless, which reinforces the low view of the self. The cycle keeps the depression going.

Learn the triad as self, world, future — in that order. Muddling the three parts, or listing only two of them, is one of the most common ways students lose marks on this topic.

Ellis (1962) offered a different cognitive explanation. He argued that good mental health is the result of rational thinking, and that depression follows from irrational beliefs — beliefs that are illogical or unrealistic and interfere with being happy. His ABC model breaks this down into three steps.

• A — Activating event. Something happens: you are rejected, you fail a test, a friend cancels a plan.
• B — Belief. You form a belief about the event. This belief may be rational ("that's disappointing, but these things happen") or irrational ("this proves nobody likes me").
• C — Consequence. The belief produces an emotional and behavioural consequence. A rational belief leads to a healthy emotion; an irrational belief leads to an unhealthy one, such as depression.

The key insight is that it is the belief (B), not the activating event (A), that produces the consequence (C). The same event can lead to very different outcomes depending on the belief applied to it.

Ellis named two common irrational beliefs. "Musturbation" is the demand that things must go a certain way ("I must succeed at everything I do"). "Utopianism" is the belief that life must always be fair. Because reality rarely meets these rigid demands, they set the person up for disappointment and depression.

Do not confuse Ellis's ABC with Beck's triad. Ellis explains depression through irrational beliefs about an event; Beck explains it through negative self-schemas and the negative triad.

If faulty thinking causes depression, then correcting that thinking should relieve it. This is the logic of cognitive behaviour therapy (CBT), the main treatment on the specification. CBT combines a cognitive element (examining thoughts) with a behavioural element (changing behaviour). The therapist works with the patient to identify negative or irrational thoughts, challenge them, and replace them with more realistic ones.

The general process:

1. Identify the negative or irrational thoughts underlying the depression.
2. Challenge those thoughts by testing them against reality.
3. Replace them with more balanced, realistic thoughts.
4. Add behavioural activation — gradually increasing engagement in enjoyable and productive activities, so that the person gathers real evidence that life can be rewarding.

Beck's version is cognitive therapy. The patient is treated as a "scientist": they are encouraged to test the reality of their negative beliefs like hypotheses. The therapist helps the patient gather evidence against beliefs such as "I always fail" — for instance by reviewing past successes. Homework tasks (recording events, testing predictions) are set between sessions so the patient collects this evidence in daily life.

CBT does not tell the patient their thoughts are wrong. It hands them the tools to test their own thoughts against evidence, so that they conclude, for themselves, that the negative belief is not supported by the facts.

Ellis extended his ABC model into a therapy called REBT — rational emotive behaviour therapy. REBT adds two more stages, giving ABCDE:

Stage	Meaning
A	Activating event
B	Belief (rational or irrational)
C	Consequence
D	Dispute the irrational belief
E	Effect — a new, healthier belief and emotional outcome

The heart of REBT is D: disputing the irrational belief. The therapist challenges the belief directly and vigorously, using three types of argument:

• Logical disputing — does the belief follow logically from the facts? ("Does failing one test really prove you are a total failure?")
• Empirical disputing — is there actual evidence for the belief? ("Where is the evidence that everybody dislikes you?")
• Pragmatic disputing — is holding this belief actually useful? ("How does believing this help you?")

Successful disputing produces E, the Effect: the irrational belief is replaced by a rational one, the unhealthy emotion is replaced by a healthier one, and the depression lifts.

Under exam pressure students often stop at ABC. Remember that Ellis's therapy is ABCDE, and it is D (Dispute) that does the therapeutic work.

A strong answer weighs the evidence for and against both the explanations and the treatment.

Research support for the cognitive explanation. Grazioli and Terry (2000) found that pregnant women with high cognitive vulnerability (a strongly negative thinking style) were more likely to become depressed after giving birth. This supports Beck's claim that negative thinking precedes and contributes to depression. The theory also has strong practical application: it allows depression to be screened for in advance and forms the basis of CBT, one of the most widely used treatments. A limitation is that it may not explain all aspects of depression — some depressed patients experience intense anger, and in rare cases hallucinations, which negative thinking alone does not easily account for.

Cause or effect? Negative thinking is clearly associated with depression, but association is not causation. It is hard to establish that negative thinking causes depression rather than being a symptom of it. The low mood might come first and generate the negative thoughts, which weakens the claim that faulty cognition is the root cause.

CBT is an effective treatment. March et al. (2007) compared treatments for 327 depressed adolescents and found CBT was as effective as antidepressant drugs, and most effective when the two were combined. Because CBT works through talking rather than medication, it also avoids the physical side effects of drugs, such as nausea and disturbed sleep. This gives CBT real, evidence-based value as a treatment.

Limitations of CBT. CBT is not suitable for everyone. Patients with severe depression may lack the motivation and concentration to engage with the demanding cognitive work, so drug treatment is sometimes needed first. More fundamentally, by focusing on the individual's thinking, CBT can overlook real situational causes of depression such as poverty or abuse. Where a person's circumstances are genuinely bleak, their negative thoughts may be a realistic response rather than an irrational distortion, and telling them to "think differently" ignores the real problem.

A balanced evaluation notes that the cognitive approach has strong support and an effective therapy, but is challenged on the direction of causation and by the fact that some negative thoughts reflect real, difficult circumstances rather than faulty cognition.

1. Muddling the three parts of the negative triad

The triad is negative views of the self, the world and the future — in that order. Listing only two, or swapping in vague terms like "other people", loses marks. Learn the exact three.

2. Confusing Beck's negative triad with Ellis's ABC model

These are two separate explanations. Beck's triad is about automatic negative views of self, world and future built on negative self-schemas. Ellis's ABC is about an irrational belief turning an activating event into a depressive consequence. Do not blend them.

3. Forgetting D and E in Ellis's therapy

The explanation is ABC. The therapy (REBT) is ABCDE, where D = Dispute the irrational belief and E = Effect (a new rational belief). Many answers describe ABC and stop, missing the two stages that make it a treatment.

4. Treating CBT as suitable for all patients

CBT is effective but not appropriate for everyone. Severely depressed patients may lack the concentration and motivation to engage with it, and it can overlook real situational causes such as poverty or abuse. Claiming CBT works for every patient overstates the evidence.

5. Confusing the cognitive and behavioural elements of CBT

CBT has both: the cognitive part identifies and challenges faulty thoughts, while the behavioural part (behavioural activation) increases engagement in enjoyable activities. Describing only the thought-challenging side gives an incomplete account of the therapy.