Component 01: Psychological Problems - Theories/Explanations: Clinical Depression — OCR GCSE Psychology

The theories and explanations of clinical depression form a core part of OCR GCSE Psychology Component 01: Psychological Problems. This topic investigates why individuals develop unipolar depression, contrasting biological explanations involving genetics and neurotransmitters with cognitive explanations centered on maladaptive thinking patterns and cognitive vulnerability.

Mastering these theories is essential because it grounds psychological debate in real-world clinical applications, illustrating how distinct theoretical viewpoints lead directly to different interventions, such as antidepressant medications versus Cognitive Behavioural Therapy (CBT). It also prepares students to critically evaluate research methods and the nature-nurture debate.

• →Biological Explanation (Genetics): Research utilizing twin and adoption studies shows depression runs in families, indicating an inherited vulnerability rather than a single causal 'depression gene'.
• →Biological Explanation (Neurochemistry): The monoamine hypothesis suggests reduced levels of the neurotransmitter serotonin inhibit normal mood regulation in the synaptic cleft.
• →Beck's Cognitive Triad: Aaron Beck suggested depression stems from negative self-schemas consisting of negative views of the self, the world, and the future.
• →Cognitive Biases: Faulty information processing, including catastrophising, black-and-white thinking, and overgeneralisation, reinforces negative schemas.
• →Diathesis-Stress Model: The holistic perspective that genetic/biological predispositions (diathesis) interact with environmental stressors to produce clinical depressive episodes.

• Identifies persistent low mood as a core clinical characteristic of depression in the ICD.
• Recognises loss of interest or pleasure in activities as a central characteristic alongside low mood.
• States that reduced energy or increased fatigue is a recognised clinical characteristic.
• Links the characteristics to a required duration and to significant distress or impairment of functioning.
• Distinguishes clinical depression from a brief low mood caused by a single passing event.
• States that prevalence is the proportion of a population with clinical depression at a point in time or over a period
• Identifies that lifetime prevalence is the proportion who experience clinical depression at any point in their life
• Recognises that reported prevalence depends on how depression is defined and measured
• Describes the sex pattern as women being diagnosed with depression more often than men
• Describes the age pattern as onset commonly in adolescence or early adulthood with further risk in later life
• Explains that ethnicity differences in prevalence are mixed and influenced by diagnosis and service access
• Defines recovery rate as the proportion improving or no longer meeting criteria over a stated period
• Notes that recovery is common but recurrence rates are high
• Identifies depression as an evolved biological response with a possible survival function
• Explains that perceiving a lower social rank can reduce conflict by prompting submission and withdrawal
• Recognises that the theory links low mood and defeat to energy conservation and avoidance of harm
• States that reductionism explains depression through component mechanisms while holism considers the whole person in context
• Applies the theory to a scenario by linking perceived defeat or low status to depressive withdrawal
• Defines the activating event as the trigger that precedes interpretation
• Distinguishes rational beliefs as logical and evidence-based from irrational beliefs as rigid and unsupported
• Explains that consequences are the emotional and behavioural outcomes of the beliefs
• Applies the model by tracing an activating event through a belief to a depressive consequence
• Discusses the freewill/determinism debate by weighing belief-driven determinism against the capacity to change beliefs
• Identifies Facebook use, envy and depression as the three central variables examined in the study.
• States that the study used college students as its sample.
• Recognises that the study reported an association between Facebook use and envy.
• Recognises that envy was linked to greater depressive symptoms in the reported findings.
• Notes that the correlational, self-report design means causation cannot be established.

• 💡Learn the characteristics in categories (emotional, cognitive, behavioural, physical) so you can select the correct option confidently.
• 💡Check each option against the requirement for persistence and impairment, not just the presence of one symptom.
• 💡Eliminate options that describe a single brief reaction rather than a sustained clinical pattern.
• 💡Learn the meaning of prevalence, lifetime prevalence and recovery rate before memorising any figure
• 💡Use the phrase 'estimates vary' when quoting a statistic and give the source context
• 💡Link each demographic pattern (age, sex, ethnicity) to one reason it might arise
• 💡Practise distinguishing prevalence from incidence in one-sentence definitions
• 💡Read the question stem for the key term, such as evolutionary function or lower rank, before choosing an option
• 💡Eliminate options that describe depression as entirely learned or entirely voluntary
• 💡Check whether the question asks about the theory's claim or about a criticism, because the correct option differs
• 💡Match each option to one letter of the model before deciding
• 💡Reject options that reverse the order of activating event, belief and consequence
• 💡For criticism questions, check whether the option names the freewill/determinism debate accurately
• 💡Read the stem carefully to see whether it asks for a finding, a variable or a limitation before choosing an option.
• 💡Eliminate options that claim proof of causation, because the study is correlational.
• 💡Check that the chosen option names the correct sample and the correct variables.
• 💡Use precise psychological terminology: say 'concordance rate' rather than 'chance', and 'synaptic cleft' or 'reuptake' rather than simply 'brain chemicals moving around'.
• 💡When answering 6-mark evaluate questions, aim for a balanced P-E-E-L structure (Point, Evidence, Explain, Link) with at least one clear strength and one clear limitation before concluding.

• Treats a single symptom such as feeling sad for one afternoon as sufficient for a diagnosis; require a sustained pattern of several characteristics over time.
• Confuses clinical depression with ordinary sadness after a setback; distinguish a persistent, impairing pattern from a normal temporary reaction.
• Lists only emotional features and ignores cognitive, behavioural and physical characteristics; include the full range across categories.
• Treats one quoted prevalence figure as a universal constant; recognise that estimates vary with definition, sample and time frame
• Confuses prevalence with incidence; keep prevalence as the proportion affected and incidence as new cases over time
• Assumes higher diagnosis rates in one ethnic group prove higher true prevalence; consider access to services and diagnostic practice
• Describes recovery as meaning no further risk; note that recurrence is common after recovery
• Treats social rank theory as claiming depression is purely learned; correct this by stressing its evolutionary, biological framing
• Assumes a lower rank always causes depression; correct this by noting the theory describes a perceived defeat or low-rank response, not an inevitable outcome
• Confuses reductionism with holism; correct this by defining reductionism as explaining through parts and holism as explaining through the whole person in context
• Places the belief before the activating event; correct this by keeping the order A then B then C
• Treats all beliefs as irrational; correct this by distinguishing rational, evidence-based beliefs from irrational ones
• Claims the model is purely deterministic; correct this by noting the freewill/determinism debate and the possibility of changing beliefs
• Claims the study proved Facebook use causes depression; correct this by noting the design was correlational and only shows associations.
• Confuses the sample with children or older adults; correct this by stating the participants were college students.
• Omits envy as a variable; correct this by including envy as the proposed link between Facebook use and depression.
• Believing that having a genetic predisposition guarantees someone will develop depression. In reality, genes provide a vulnerability that usually requires environmental triggers to activate.
• Confusing Beck's Cognitive Triad (Self, World, Future) with Ellis's ABC model (Activating event, Belief, Consequence), which is a separate cognitive framework.

1. 1Session 1: Outline the biological theory (genes and serotonin) and make comparison flashcards of twin study concordance rates.
2. 2Session 2: Draw and annotate Beck's cognitive triad diagram with everyday examples of negative schemas and cognitive biases.
3. 3Session 3: Practice writing comparative evaluation paragraphs weighing biological versus cognitive explanations (reductionism, treatments, causality).
4. 4Session 4: Complete a timed 6-mark exam question evaluating one or both explanations under closed-book conditions.

• 📋Short-answer definitions/descriptions (2-3 marks): Defining concepts like the negative triad or neurotransmitter deficiency.
• 📋Application questions (3-4 marks): Applying cognitive biases or genetic concepts to a short scenario about a fictional patient.
• 📋Extended response / Evaluation questions (6 marks): Critically assessing the strengths and limitations of biological versus psychological explanations.