AQA Syllabus focus:
'The cognitive approach to explaining depression: Beck’s negative triad and Ellis’s ABC model.'
These notes explain two major cognitive explanations of depression, showing how patterns of negative thinking can shape emotional experience. The focus is on Beck’s negative triad and Ellis’s ABC model.
The cognitive approach to depression
The cognitive approach argues that depression is linked to the way a person thinks, interprets, and processes information. Rather than seeing low mood as caused only by external events, cognitive psychologists argue that distorted thinking patterns make depression more likely and can keep it going over time.
A key assumption is that people do not simply react to reality itself. They react to their interpretation of reality. If that interpretation is consistently negative, hopeless, or irrational, depression may develop.
Beck’s cognitive theory
Aaron Beck proposed that depression is associated with negative schemas and faulty information processing. These create a biased pattern of thinking in which a person notices and remembers the negative side of experience more than the positive.
Negative schemas
A schema is a mental framework used to organize and interpret information. Beck argued that some people develop negative self-schemas, often through early experiences such as rejection, criticism, or failure. These schemas then influence how later events are understood.
Schema: A mental framework that helps a person organize and interpret information.
If a person already has a negative schema, they may interpret ordinary situations in a pessimistic way. Neutral or mildly disappointing events can be treated as evidence that they are inadequate or unlovable.
Beck also argued that depressed people show faulty information processing. This means they think in a biased way, such as:
focusing on the negative aspects of a situation
ignoring positive evidence
blowing small problems out of proportion
drawing overly negative conclusions from limited evidence
These biases strengthen negative schemas, making the person’s thinking increasingly rigid and self-reinforcing. This helps explain why depressed thinking can feel automatic and difficult to challenge.
Beck’s negative triad
Beck suggested that depression is maintained by a negative triad, which involves three kinds of negative thinking that operate together.
Diagram of Beck’s cognitive (negative) triad, illustrating how negative views of the self, the world, and the future form a mutually reinforcing system. This visual helps you see why Beck describes the triad as maintaining depression rather than being three isolated thoughts. Source
Negative triad: A pattern of negative thinking involving the self, the world, and the future.
The three parts of the triad are:
Negative view of the self: the person sees themselves as worthless, weak, or defective.
Negative view of the world: the person sees their environment as unfair, demanding, or overwhelming.
Negative view of the future: the person expects failure, rejection, or continued unhappiness.
These three views interact. A negative view of the self makes setbacks feel like personal proof of failure. A negative view of the world makes everyday life seem full of obstacles. A negative view of the future creates hopelessness, which is especially important in depression because it reduces motivation and the belief that things can improve.
The triad therefore helps explain why depression can become persistent. Negative thoughts are not isolated; they form an organized system that shapes attention, memory, and interpretation.
Ellis’s ABC model
Albert Ellis offered a related but slightly different cognitive explanation. He argued that depression is often caused not directly by an event, but by the beliefs a person holds about that event.
The ABC sequence
Ellis described three linked parts:
Flow diagram of Ellis’s ABC sequence, showing how an activating event (A) leads to consequences (C) through the person’s beliefs (B). It reinforces the key exam point that Ellis sees beliefs as the critical mediating step, not the event itself. Source
A – Activating event: something happens in a person’s life, such as criticism, loss, or disappointment.
B – Belief: the person interprets the event through a belief system.
C – Consequence: the emotional and behavioral result follows from the belief.
In this model, B is the crucial part. Two people may face the same activating event, but if one person responds with rigid, negative, or illogical beliefs, they are more likely to experience depressive consequences.
Irrational beliefs: Unrealistic, illogical, and self-defeating beliefs that distort how a person interprets events.
Ellis argued that people with depression often hold irrational beliefs, especially very absolute ideas such as “I must succeed” or “People must always approve of me.” When reality does not match these demands, the person may produce unhealthy emotional consequences such as guilt, worthlessness, or depression.
Common features of irrational beliefs include:
demandingness, using rigid ideas like “must,” “should,” or “ought”
awfulizing, treating a bad event as if it is the worst thing possible
low frustration tolerance, believing discomfort is unbearable
self-downing, judging the whole self negatively after a setback
Ellis’s model therefore emphasizes that it is not simply adversity that produces depression. It is the meaning a person gives to adversity. The same event can produce very different outcomes depending on the beliefs attached to it.
How the two explanations relate
Both Beck and Ellis see depression as strongly influenced by maladaptive cognition. In both theories, negative thinking does not just reflect depression; it helps explain how depression begins and continues.
There are, however, important differences:
Beck focuses on negative schemas, biased processing, and the negative triad.
Ellis focuses on how irrational beliefs link events to emotional consequences.
Beck’s model is centered on a broad pattern of negative views about the self, world, and future.
Ellis’s model is more explicitly structured as a sequence from activating event to belief to consequence.
Both explanations highlight why two people can experience similar situations but respond very differently. According to the cognitive approach, what matters is not only what happens, but also how the person thinks about what happens.
Practice Questions
State two elements of Beck’s negative triad. (2 marks)
1 mark for negative view of the self
1 mark for negative view of the world
1 mark for negative view of the future
Maximum 2 marks
Explain Ellis’s ABC model as an explanation of depression. (6 marks)
Award 1 mark for each relevant point, up to 6 marks:
A stands for activating event
B stands for belief
C stands for consequence
The activating event does not directly cause depression
Depression is more likely when beliefs are irrational, rigid, or illogical
Consequences include unhealthy negative emotions such as depression, guilt, or worthlessness
Credit examples of irrational beliefs such as must/should thinking, awfulizing, low frustration tolerance, or self-downing
FAQ
A schema is a deeper mental structure that shapes how a person understands themselves and the world. An automatic thought is the quick, surface-level thought that pops into mind in a specific situation.
Schemas often produce automatic thoughts. For example, a negative schema such as “I am inadequate” may lead to automatic thoughts like “I’ll fail this” or “People will judge me.”
Self-downing means turning a single failure or disappointment into a judgment about the whole self. Instead of thinking “I did badly,” the person thinks “I am bad” or “I am worthless.”
This matters because it makes setbacks feel global and permanent. It increases shame and hopelessness, which can deepen depressive thinking.
Ellis believed rigid language reveals rigid beliefs. When a person says “I must succeed” or “People should always treat me fairly,” they create absolute rules that real life often breaks.
When those rules are broken, the person may react with extreme emotion. A more flexible belief, such as “I want to succeed, but I can cope if I do not,” is less likely to produce depression.
Negative schemas can bias what a person notices, stores, and later recalls. Information that fits the schema is easier to remember, while positive or neutral information may be overlooked.
This can create a distorted personal history. Someone may remember criticism very clearly but struggle to recall praise, which makes their negative self-view feel confirmed.
No. The negative triad is best understood as a theoretical explanation of depressive thinking, not a formal diagnostic checklist.
Clinicians may use the idea to understand a client’s thought patterns, but diagnosis depends on broader clinical criteria, structured assessment, and the overall pattern of symptoms.
