Comparing Approaches

Comparison of Psychological Approaches

Psychology is unusual among academic disciplines in having several major theoretical approaches that offer quite different — and sometimes competing — accounts of the same phenomena. Rather than there being a single unified psychological science, students must understand each approach on its own terms and be able to critically compare them. The five major approaches covered in the AQA specification each differ in their assumptions about human nature, the causes of behaviour, the appropriate methods of study, and the implications for treatment and application.

Free Will vs Determinism

A central debate across approaches concerns the extent to which behaviour is freely chosen or determined by forces outside the individual's control. The behaviourist approach is the most strongly deterministic — all behaviour is determined by conditioning history and environmental contingencies; free will is an illusion. The psychodynamic approach is also determinist — behaviour is determined by unconscious forces beyond the individual's conscious control. The biological approach is biologically determinist — behaviour is determined by genetic makeup and neurological structures. By contrast, the humanistic approach is the most committed to free will — Rogers and Maslow emphasised personal agency and the individual's capacity to choose their own direction. The cognitive approach occupies an intermediate position, acknowledging both deterministic information processing and the role of deliberate, chosen thought.

Nature vs Nurture

Approaches differ in how much weight they give to biological (nature) versus environmental and experiential (nurture) factors. The biological approach emphasises nature most strongly — genes, brain structures, and evolution shape behaviour. The behaviourist approach is at the nurture extreme — Watson claimed all behaviour is learnt through environmental experience. Social learning theory also emphasises nurture but includes cognitive mediators. The psychodynamic and humanistic approaches occupy intermediate positions — both acknowledge innate drives (libido, the actualising tendency) but emphasise the formative role of early experience and relationships.

Reductionism vs Holism

Reductionism involves explaining behaviour in terms of simpler, lower-level components. The biological approach is reductive — it explains behaviour in terms of genes and neurotransmitters. The behaviourist approach is reductive — it reduces complex behaviour to stimulus-response associations. The cognitive approach is moderately reductive — it explains thought in terms of information processing components. By contrast, the humanistic approach is explicitly holistic — it insists on understanding the whole person in their full subjective and relational context, arguing that reductionism loses what is most distinctively human.

Scientific Credentials

Approaches vary in how readily they can be studied using the methods of natural science. The behaviourist and cognitive approaches have the strongest scientific credentials — they use controlled experiments, objective measurement, and statistical analysis. The biological approach also uses objective methods (brain imaging, genetic analysis). The psychodynamic approach is most frequently criticised for poor scientific rigour — it relies on case studies and concepts that are difficult to operationalise and falsify. The humanistic approach explicitly resists scientific reduction of human experience — it uses qualitative and phenomenological methods that prioritise rich description over statistical generalisation.

Implications for Treatment

Each approach generates characteristic therapeutic interventions: the behaviourist approach produces behaviour therapy (systematic desensitisation, flooding, token economies); cognitive psychology underpins CBT; the biological approach generates pharmacological treatments (antidepressants, antipsychotics); the psychodynamic approach produced psychoanalysis and psychodynamic therapy; the humanistic approach generated person-centred therapy. Contemporary clinical practice typically draws on multiple approaches in an eclectic or integrative framework.