Comparison of Approaches

A distinctive and heavily examined skill in A-Level Psychology is the ability to compare and contrast the major psychological approaches across a set of recurring themes. Having met the approaches across the Edexcel course — the biological, learning (behaviourist and social learning), cognitive, psychodynamic and humanistic approaches — you must be able to step back and see how they relate: where they agree, where they sharply disagree, and what each gains or loses by taking the position it does. The skill is genuinely synoptic. It is not enough to describe each approach in turn; the marks lie in explicit comparison along defined dimensions — views of development, nature versus nurture, reductionism versus holism, determinism versus free will, scientific methods, and idiographic versus nomothetic explanation — and in reaching a reasoned judgement. For Edexcel 9PS0 this material is assessed on Paper 3, where the same issues and debates you have studied in their own right are applied to the approaches themselves. This lesson provides a systematic framework for the comparison, works through each theme in depth, illustrates which approaches best explain particular behaviours, and shows how modern psychology integrates the approaches through eclecticism and the biopsychosocial model.

By the end of this lesson you should be able to compare the five approaches explicitly on each of the six named dimensions; explain why the dimensions cluster into two coherent groups; identify which approach best explains particular behaviours; and evaluate the comparison, arguing that its greatest value lies in motivating integration rather than crowning a winner.

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Spec Mapping

Edexcel 9PS0 — Paper 3: Psychological Skills. This lesson develops the skill of comparing the approaches on the dimensions Edexcel expects: views of development, the nature-nurture debate, reductionism, determinism, the use of scientific methods, and idiographic versus nomothetic explanation. It is the natural meeting point of the approaches with the issues-and-debates material assessed on this paper.

Assessment Objective	What it looks like on this skill
AO1 — knowledge & understanding	Outlining each approach's position on each dimension (e.g. biological = nature, reductionist, deterministic, scientific, nomothetic).
AO2 — application	Deciding which approach(es) best explain a named behaviour or scenario, and justifying the choice on the dimensions.
AO3 — analysis & evaluation	Explicitly comparing approaches with connectives, weighing the value of comparison, and arguing for integration (eclecticism, biopsychosocial).

Connects to…

• Clinical Psychology — the "which approach explains which behaviour" analysis maps directly onto the competing explanations and treatments of schizophrenia and depression, and onto the case for eclecticism (CBT plus SSRIs).
• Psychology as a science — the "scientific methods" dimension feeds straight into the science debate, where the same approaches are judged against Popper's and Kuhn's criteria.
• Nomothetic-idiographic and reductionism-holism — these debates are examined here as applied to the approaches and again in their own right, so the comparison is a bridge across the whole Paper 3 unit.

Examiners reward explicit comparison, not parallel description; the single most valuable habit is to link approaches directly with connectives such as "whereas," "by contrast," "similarly" and "unlike."

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The Master Comparison Table

The following table is the framework you should carry into any comparison question. Each row is one of the named dimensions; each column is one approach.

Dimension	Biological	Learning (behaviourist / SLT)	Cognitive	Psychodynamic	Humanistic
View of development	Maturation of innate, genetically timed processes; biological "readiness"	Continuous; conditioning is the same at any age; observational learning across life as mediational ability matures	Continuous; schemas refine with experience (some stage ideas, e.g. Piaget)	Stage theory — discrete psychosexual stages in a fixed childhood sequence	Continuous personal growth; the self develops via congruence and the actualising tendency
Nature vs nurture	Strongly nature (genes, neurochemistry, evolution)	Strongly nurture (conditioning, observation) with some innate capacity for imitation	Interactionist (innate processing capacity shaped by experience)	Both — innate drives unfold through early experience	Mostly nurture (conditions of worth) but emphasis on free will over either
Reductionism vs holism	Highly reductionist (biological reductionism)	Reductionist (stimulus-response; SLT adds cognitive mediation)	Reductionist (machine reductionism)	Reductionist concepts but a relatively holistic overall picture	Holistic — the whole, integrated person
Determinism vs free will	Hard biological determinism	Hard environmental determinism (behaviourist); soft reciprocal determinism (SLT)	Soft determinism (schemas guide but do not dictate)	Psychic determinism (unconscious drives)	Free will
Scientific methods	Very scientific (objective biological measures)	Scientific (controlled lab experiments, e.g. Bobo doll)	Scientific (experiments, brain imaging, modelling)	Unscientific (case studies, unfalsifiable)	Unscientific (subjective, non-falsifiable concepts)
Idiographic vs nomothetic	Nomothetic (general laws)	Nomothetic	Nomothetic	Idiographic (individual case studies)	Idiographic (the unique individual)

Exam Tip: Examiners reward explicit comparison, not parallel description. Use connective phrasing to link approaches directly: e.g. "Whereas the biological approach is hard determinist, locating the cause of behaviour in genes and neurochemistry, the humanistic approach insists on free will and active personal agency."

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Theme 1 — Views of Development

Approaches differ over how and when behaviour develops.

• Stage versus continuous. The psychodynamic approach is the clearest stage theory: development proceeds through discrete psychosexual stages (oral, anal, phallic, latency, genital) in a fixed order, with the bulk of personality laid down in early childhood. Most other approaches treat development as continuous and quantitative. For the learning approach the laws of conditioning operate identically across the lifespan, so a child and an adult learn in the same way, while social learning theory adds that the capacity for mediational processes matures, allowing more sophisticated imitation with age.
• Maturation versus learning. The biological approach emphasises maturation — genetically programmed changes that unfold on a biological timetable regardless of experience, so behaviour appears when the organism is biologically "ready." This contrasts with the learning view that development is driven by environmental experience.
• Growth of the self. The humanistic approach frames development as the lifelong unfolding of the self through the actualising tendency, helped or hindered by congruence and conditions of worth, while the cognitive approach sees development as the progressive elaboration and refinement of schemas through experience.

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Theme 2 — Nature versus Nurture

Position	Approach(es)	Explanation
Strongly nature	Biological	Behaviour is shaped primarily by genes, neurochemistry, brain structures and evolution
Strongly nurture	Learning	Behaviour is learned from the environment through conditioning or observation and imitation
Interactionist	Cognitive, Psychodynamic	Both contribute: cognitive schemas are innate capacities shaped by experience; Freud combined innate drives with childhood experience
Emphasis on neither (free will)	Humanistic	Acknowledges conditions of worth (nurture) but stresses that people transcend both forces through choice

The fault line is sharpest between the biological approach (nature) and the learning approach (nurture) — a useful contrast for any nature-nurture essay. The most defensible modern position, however, is interactionist: the biological approach's own genotype-phenotype distinction concedes that genes express themselves only in interaction with the environment, while the learning approach cannot fully explain why conditioning works more readily for some associations than others (biological preparedness).

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Theme 3 — Reductionism versus Holism

• Reductionist approaches explain behaviour by breaking it into simpler components:
  • Learning — reduces behaviour to stimulus-response associations (environmental reductionism).
  • Biological — reduces behaviour to genes, neurotransmitters and brain structures (biological reductionism).
  • Cognitive — reduces behaviour to discrete information-processing steps (machine reductionism).
• Holistic approaches consider the whole, integrated person:
  • Humanistic — studies the complete person in their subjective and social context, refusing to break them into parts.
  • Psychodynamic — though individual concepts (e.g. fixation) can be reductionist, the overall account is relatively holistic, weaving together id, ego, superego, drives and childhood experience.

The trade-off is the heart of this theme: reductionism delivers scientific precision and testability but risks losing the meaning and context of behaviour, whereas holism preserves the meaningful whole but is harder to study scientifically. This is why the reductionist approaches tend also to be the more scientific ones, and the holistic approaches the less scientific — a connection worth making explicit in an essay.

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Theme 4 — Determinism versus Free Will

Position	Approach(es)	Explanation
Hard determinism	Biological, learning (behaviourist)	Behaviour is the inevitable product of internal (genes, neurochemistry) or external (conditioning) causes; no genuine choice
Soft determinism	Cognitive, learning (SLT)	Behaviour is influenced by internal/external factors but the person retains some choice (e.g. reciprocal determinism)
Psychic determinism	Psychodynamic	Behaviour, including slips and accidents, is determined by unconscious drives and childhood experience
Free will	Humanistic	The person is an active agent capable of genuine, self-directed choice

The clearest opposition is between the biological/behaviourist hard-determinist pole and the humanistic free-will pole, with the psychodynamic approach occupying its own distinctive position: psychic determinism locates the cause of behaviour not in the environment or the body but in unconscious drives and childhood experience. It is worth distinguishing carefully between the types of determinism, because examiners reward this precision. Hard determinism holds that free will is an illusion and every action is the inevitable product of prior causes. Soft determinism holds that behaviour is constrained by internal and external factors but the person still exercises meaningful choice within those constraints — in social learning theory this is captured by Bandura's notion of reciprocal determinism, in which the person and the environment influence each other in both directions. Psychic determinism is a third variant, determinist about unconscious causation. Determinism in general aligns the approaches with the assumptions of science — the idea that every effect has a discoverable cause is what makes prediction and control possible — which is one reason the deterministic approaches are also the more scientific. The humanistic insistence on free will, by contrast, is one reason that approach sits awkwardly with the scientific method, since genuinely free choices would be, by definition, unpredictable.

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Theme 5 — Scientific Methods

Each approach favours methods that reflect its assumptions, and these directly shape its scientific credibility.

Approach	Preferred methods	Why
Biological	Brain scans, twin and adoption studies, genetic analysis, drug trials	Needs objective, quantifiable biological measures
Learning	Controlled laboratory experiments (often animals, or children for SLT, e.g. Bobo doll)	Values objectivity, control and measurable, observable behaviour
Cognitive	Lab experiments, computer modelling, brain imaging	Requires controlled tasks to infer unobservable mental processes
Psychodynamic	Case studies, clinical observation, dream analysis	Requires rich, in-depth exploration of the individual
Humanistic	Unstructured interviews, the Q-sort, qualitative methods	Prioritises the individual's subjective experience

The pattern is clear: the biological, learning and cognitive approaches use controlled, objective, replicable methods and are widely regarded as scientific, whereas the psychodynamic and humanistic approaches rely on subjective, qualitative methods and are frequently judged unscientific (the psychodynamic approach also being criticised as unfalsifiable). This theme connects tightly to the dedicated "Psychology as a science" lesson.

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Theme 6 — Idiographic versus Nomothetic

Key Definition: Nomothetic approach — aims to establish general laws of behaviour that apply to all people (the biological, learning and cognitive approaches). Idiographic approach — focuses on the unique individual and their personal experience (the psychodynamic and humanistic approaches).

The nomothetic approaches use large samples and standardised, often quantitative methods to generalise, which fits the scientific aim of prediction and control but can lose the individual in the average. The idiographic approaches use detailed case studies and qualitative methods to understand the particular person in depth, which captures uniqueness and meaning but limits generalisation and scientific testability. Note the strong alignment running through the comparison: approaches that are nomothetic also tend to be scientific, reductionist and deterministic, while the idiographic approaches tend to be less scientific, more holistic, and (in the humanistic case) committed to free will.

The Threads Pull Together

The single most important insight from comparing the approaches is that these six dimensions are not independent — they hang together in two recognisable clusters.

graph TD
    A["Scientific cluster<br/>(biological, learning, cognitive)"] --> A1["Nomothetic"]
    A --> A2["Reductionist"]
    A --> A3["Deterministic"]
    A --> A4["Objective / experimental methods"]
    B["Interpretive cluster<br/>(humanistic, psychodynamic)"] --> B1["Idiographic"]
    B --> B2["Holistic / less reductionist"]
    B --> B3["Free will (humanistic) / unconscious determinism"]
    B --> B4["Qualitative methods"]

At one pole sit the scientific approaches (biological, learning, and largely cognitive): they tend to be nomothetic, reductionist, deterministic, and to favour objective, experimental methods. At the opposite pole sit the humanistic and, in important respects, the psychodynamic approaches: they tend to be idiographic, holistic (or less reductionist), more open to free will (humanistic) or to unconscious determinism via in-depth study (psychodynamic), and to favour qualitative methods. Understanding why these clusters form is itself an evaluative achievement: a commitment to the scientific method requires objectivity, control and the search for general laws, which naturally pulls an approach towards reductionism, nomothetic method and determinism; conversely, a commitment to studying the whole, unique, freely-choosing person requires holism and idiographic, qualitative enquiry, which sits in tension with conventional science. Seeing the dimensions as a connected web, rather than a list of separate boxes, is what lifts a comparison answer from descriptive to genuinely analytical.

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Which Approach Best Explains Specific Behaviours?

Behaviour	Best explained by	Why
Depression	Cognitive + biological	Negative schemas / the cognitive triad explain the thinking patterns; low serotonin explains the neurochemical basis; CBT and SSRIs are both effective treatments
Aggression	Biological + learning	Testosterone and evolved mechanisms (biological) and observational learning (Bandura's Bobo doll, SLT) both contribute
Phobias	Learning + psychodynamic	Classical conditioning (Little Albert) explains acquisition; Freud offers an alternative unconscious account (Little Hans)
Schizophrenia	Biological	Strong genetic evidence (twin studies), the dopamine hypothesis, and the effectiveness of antipsychotics

The lesson here is that different behaviours are best illuminated by different approaches, and that several behaviours are best understood by combining approaches — which is precisely the rationale for eclecticism.

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Eclecticism and Integration

Modern psychology increasingly recognises that no single approach can fully explain the complexity of human behaviour, leading to integration.

Key Definition: Eclecticism — drawing on ideas and techniques from multiple psychological approaches rather than adhering rigidly to one. It is the norm in modern clinical practice.

A clinician might use CBT (cognitive) to challenge negative thinking while also prescribing SSRIs (biological) to address neurochemistry — a combination often more effective than either alone for moderate-to-severe depression. This is a principled strategy of selecting the most effective combination for a given problem, not a lack of commitment.

The Biopsychosocial Model