Approaches in Psychology

The Biological Approach

Assumptions

The biological approach assumes that all behaviour and mental processes have a physiological basis. Psychological phenomena can be explained in terms of genetics, neurochemistry, brain structure and function, and the evolution of adaptive behaviours.

Key Concepts

Genetics: DNA carries instructions for the development and functioning of organisms. Behavioural genetics investigates the heritability of psychological traits and disorders using family, twin, and adoption studies. Monozygotic (MZ) twins share $100\%$ of their genes; dizygotic (DZ) twins share approximately $50\%$. Higher concordance rates in MZ than DZ twins suggest a genetic component.

Neurochemistry: neurotransmitters (chemical messengers) transmit signals across synapses. Imbalances in neurotransmitter systems are implicated in psychological disorders: low serotonin in depression, high dopamine in schizophrenia, low GABA in anxiety disorders.

Brain structure and function: different brain regions are specialised for different functions. Brain imaging techniques (fMRI, EEG, PET) allow researchers to investigate the neural correlates of behaviour and mental processes. Damage to specific brain areas (e.g., Phineas Gage, whose frontal lobe injury caused personality changes) demonstrates the relationship between brain structure and behaviour.

Evolution: the evolutionary approach (based on Darwin's theory of natural selection) proposes that behaviours that enhanced survival and reproduction in ancestral environments have been selected for and are genetically transmitted. Examples: attachment (Bowlby), facial expressions of emotion (Ekman), mate selection preferences.

Strengths and Limitations

Strengths: highly scientific (uses objective methods such as brain scanning, biochemical analysis, and genetic studies); produces replicable, quantifiable data; has led to effective biological treatments (psychopharmacology, deep brain stimulation); well-established causal pathways between biology and behaviour in many cases.

Limitations: reductionist (reduces complex behaviour to biological mechanisms, ignoring social, cognitive, and environmental factors); deterministic (implies that behaviour is determined by genes and biology, minimising free will); biologically based treatments may have side effects and do not address the underlying causes of psychological problems; animal research raises ethical concerns and may not generalise to humans.

The Behaviourist Approach

Assumptions

The behaviourist approach assumes that all behaviour is learned through interaction with the environment. Internal mental states are either irrelevant or cannot be studied scientifically. Psychology should focus on observable behaviour rather than unobservable mental processes.

Key Concepts

Classical conditioning (Pavlov, 1927): learning through association. An unconditioned stimulus (UCS) that naturally produces an unconditioned response (UCR) is paired with a neutral stimulus (NS). After repeated pairings, the NS becomes a conditioned stimulus (CS) that elicits a conditioned response (CR) similar to the UCR. Key processes: acquisition, extinction, spontaneous recovery, generalisation, discrimination.

Operant conditioning (Skinner, 1953): learning through consequences. Behaviour followed by a reinforcing consequence is more likely to be repeated; behaviour followed by a punishing consequence is less likely to be repeated. Key concepts:

• Positive reinforcement: adding a pleasant stimulus to increase behaviour (e.g., praise for good work)
• Negative reinforcement: removing an aversive stimulus to increase behaviour (e.g., taking painkillers removes pain, reinforcing pill-taking)
• Positive punishment: adding an aversive stimulus to decrease behaviour (e.g., scolding)
• Negative punishment: removing a pleasant stimulus to decrease behaviour (e.g., removing privileges)

Social learning theory (Bandura, 1961, 1977): extends behaviourism by incorporating observational learning (modelling). Individuals learn by observing the behaviour of others and the consequences of that behaviour. Key processes:

• Attention: the observer must notice the model's behaviour
• Retention: the observer must remember the behaviour
• Reproduction: the observer must be capable of reproducing the behaviour
• Motivation: the observer must be motivated to imitate the behaviour (vicarious reinforcement: seeing the model rewarded increases motivation)

Bandura's Bobo doll experiment (1961) demonstrated that children who observed an aggressive model were significantly more likely to behave aggressively toward the Bobo doll than children who observed a non-aggressive model or no model.

Strengths and Limitations

Strengths: highly scientific (uses controlled experiments with measurable variables); practical applications (behaviour modification, token economies, systematic desensitisation); supported by extensive experimental evidence (Pavlov, Skinner, Bandura); has contributed to effective treatments for phobias and behavioural disorders.

Limitations: oversimplified (ignores internal mental processes such as thought, emotion, and motivation); overemphasises the role of the environment and neglects biological influences; animal research may not generalise to humans; deterministic (individuals are viewed as passive products of environmental conditioning).

The Social Learning Theory Approach

Assumptions

Social learning theory (SLT) assumes that behaviour is learned through observation, imitation, and modelling, and that cognitive processes mediate the relationship between observation and behaviour. Unlike radical behaviourism, SLT acknowledges that internal mental states play a role in learning.

Key Concepts (detailed)

Mediational processes: Bandura proposed that four cognitive processes mediate whether observed behaviour is imitated:

1. Attention: determined by the characteristics of the model (status, attractiveness, similarity to the observer) and the observer's own cognitive abilities and perceptual set
2. Retention: the behaviour must be stored in memory as a mental representation (verbal or visual)
3. Motor reproduction: the observer must have the physical capability to reproduce the behaviour
4. Motivation: the observer must expect to be reinforced for imitating the behaviour (direct reinforcement, vicarious reinforcement, or self-reinforcement)

Identification and modelling: individuals are more likely to imitate models with whom they identify (similar age, gender, status). Children are particularly influenced by same-sex models (Bandura found that boys imitated the male aggressive model more than the female model).

Vicarious reinforcement: learning through observing the consequences of others' behaviour. Seeing a model rewarded increases the likelihood of imitation; seeing a model punished decreases it.

Strengths and Limitations

Strengths: accounts for the learning of complex social behaviours that cannot be explained by direct conditioning alone; acknowledges the role of cognitive processes, addressing a key weakness of behaviourism; supported by experimental evidence (Bobo doll study); practical applications in media effects research, parenting, and education.

Limitations: laboratory studies (e.g., Bobo doll) may lack ecological validity (hitting an inflatable doll is not equivalent to real aggression); the theory does not fully account for individual differences in susceptibility to modelling; biological factors (hormones, genetics) are largely ignored.

The Cognitive Approach

Assumptions

The cognitive approach assumes that behaviour can be explained by mental processes (thoughts, beliefs, expectations, perceptions, memory). Internal mental states are legitimate objects of scientific study. The mind functions like an information processor, analogous to a computer.

Key Concepts

Schema theory: schemas are mental frameworks or templates that organise knowledge and guide the processing of information. They influence perception, memory, and behaviour by providing expectations about the world. Schemas are developed through experience and can be resistant to change. Bartlett (1932) demonstrated that participants recalled stories in ways that were consistent with their cultural schemas, distorting unfamiliar details to fit their expectations.

Cognitive neuroscience: uses brain imaging techniques to investigate the neural basis of cognitive processes. For example, fMRI studies have identified the hippocampus as critical for memory formation and the prefrontal cortex as important for decision-making and executive function.

Cognitive distortions: systematic errors in thinking that contribute to psychological disorders. Beck identified cognitive distortions in depression (catastrophising, overgeneralisation, black-and-white thinking). Ellis identified irrational beliefs that contribute to emotional distress.

Information processing models: models of memory (multi-store model, working memory model) and cognitive development describe how information is encoded, stored, retrieved, and transformed.

Strengths and Limitations

Strengths: highly scientific (uses controlled experiments and objective measures such as reaction times, error rates, and brain imaging); has generated effective treatments (CBT); accounts for internal mental processes that behaviourism ignores; has practical applications in education, artificial intelligence, and clinical psychology.

Limitations: may be reductionist (reducing complex mental life to information processing); difficult to study mental processes directly (they must be inferred from behaviour); machine analogy may be an oversimplification of human cognition; individual differences in cognitive processing are often overlooked; the approach may not adequately account for emotions, social context, and cultural factors.

The Psychodynamic Approach

Assumptions

The psychodynamic approach (Freud) assumes that behaviour is determined by unconscious processes, conflicts, and desires from early childhood. The mind is divided into conscious, preconscious, and unconscious levels. Behaviour is motivated by instinctual drives (the libido, or life energy) and defence mechanisms that protect the ego from anxiety.

Key Concepts

Structure of personality: Freud proposed three interacting systems:

• Id: the primitive, instinctual part of the personality, present from birth, operating on the pleasure principle (immediate gratification of desires)
• Ego: the rational, conscious part of the personality, developing in the first two years, operating on the reality principle (delaying gratification to satisfy the id in socially acceptable ways)
• Superego: the moral component, developing through identification with the same-sex parent (around age $5$), representing internalised societal and parental values

Psychosexual stages: personality develops through five stages, each focused on a different erogenous zone. Fixation at any stage (due to excessive gratification or frustration) produces characteristic adult personality traits:

1. Oral stage ($0$--$1$ year): mouth; fixation may produce oral habits (smoking, overeating) or dependency
2. Anal stage ($1$--$3$ years): anus; fixation may produce anal-retentive (orderly, stubborn) or anal-expulsive (messy, disorganised) traits
3. Phallic stage ($3$--$6$ years): genitals; the Oedipus complex (boys) or Electra complex (girls); resolution through identification with the same-sex parent
4. Latency stage ($6$--$12$ years): sexual impulses are repressed; focus on intellectual and social development
5. Genital stage ($12$+): mature sexual interest in others

Defence mechanisms: unconscious strategies the ego uses to protect itself from anxiety:

• Repression: pushing unacceptable thoughts into the unconscious
• Denial: refusing to acknowledge a threatening aspect of reality
• Displacement: redirecting emotions from a threatening target to a safer one
• Projection: attributing one's own unacceptable thoughts or feelings to another person
• Sublimation: channelling unacceptable impulses into socially acceptable activities

Dream analysis: Freud believed dreams are the "royal road to the unconscious." Manifest content (the dream as experienced) represents the disguised, symbolic expression of latent content (unconscious wishes and conflicts).

Strengths and Limitations

Strengths: acknowledges the importance of unconscious processes and early childhood experience; the concept of defence mechanisms has empirical support and practical utility; Freud's ideas have profoundly influenced Western culture, literature, and the arts; psychoanalysis provides a comprehensive theory of personality.

Limitations: largely unscientific (concepts such as the id, ego, and superego cannot be empirically measured or falsified — Popper argued that psychoanalysis is a pseudoscience); based on a small, unrepresentative sample (Viennese women with hysteria); overemphasises sexuality and aggression; deterministic (unconscious drives determine behaviour); case study evidence is subjective and lacks reliability; many Freudian concepts lack empirical support.

The Humanistic Approach

Assumptions

The humanistic approach assumes that individuals have free will and the innate capacity for personal growth and self-actualisation. It emphasises subjective experience (phenomenology), individual uniqueness, and the importance of the whole person (holism). It arose as a reaction to the determinism of behaviourism and psychodynamic theory.

Key Concepts

Maslow's hierarchy of needs (1943): human motivation is organised in a hierarchy, from basic physiological needs to self-actualisation:

1. Physiological needs (food, water, shelter)
2. Safety needs (security, stability)
3. Love and belonging needs (relationships, social connection)
4. Esteem needs (self-respect, recognition)
5. Self-actualisation (realising one's full potential)

Lower needs must be substantially satisfied before higher needs become motivating.

Rogers's person-centred approach (1959): the self-concept consists of the ideal self (who the person wants to be) and the self-image (who the person believes they are). Psychological health depends on congruence between the ideal self and self-image. Incongruence (a gap between the two) produces anxiety and defensiveness.

Conditions of worth: conditions imposed by others that the individual must meet to receive positive regard (e.g., "you are only lovable if you succeed"). These lead to incongruence as the individual suppresses authentic experiences that do not meet the conditions.

Unconditional positive regard: acceptance and support without conditions. Rogers argued that providing unconditional positive regard enables the individual to develop congruence and move toward self-actualisation.

Client-centred therapy: a non-directive therapeutic approach in which the therapist provides empathy, unconditional positive regard, and genuineness, enabling the client to explore their feelings and achieve self-actualisation.

Strengths and Limitations

Strengths: acknowledges free will and individual agency (a contrast to deterministic approaches); holistic (considers the whole person rather than isolated components); emphasises the positive aspects of human nature; person-centred therapy is widely used and valued by clients; has influenced education, counselling, and management.

Limitations: lacks scientific rigour (concepts such as self-actualisation and congruence are difficult to define and measure); based on a Western, individualistic worldview (self-actualisation may not be a universal concept); optimistic about human nature and may underestimate the role of unconscious conflicts and biological factors; difficult to empirically test its predictions.

Comparison of Approaches

Dimension	Biological	Behaviourist	Cognitive	Psychodynamic	Humanistic
Focus	Genes, brain, neurochemistry	Observable behaviour	Mental processes	Unconscious conflicts	Free will, self-actualisation
Methodology	Lab experiments, brain imaging, genetic studies	Lab experiments, animal studies	Lab experiments, cognitive tasks	Case studies, clinical interviews	Qualitative, case studies
Determinism	Strongly deterministic	Strongly deterministic	Soft determinism	Strongly deterministic	Anti-deterministic (free will)
Nature vs. nurture	Nature	Nurture	Interaction	Both (emphasis on nature)	Nurture
Scientific status	Highly scientific	Highly scientific	Highly scientific	Low (unfalsifiable)	Low (subjective)
Applications	Psychopharmacology, deep brain stimulation	Behaviour modification, token economies	CBT, educational interventions	Psychoanalysis, dream analysis	Person-centred therapy

Common Pitfalls

• Confusing negative reinforcement with punishment. Negative reinforcement removes an aversive stimulus to increase behaviour; punishment introduces an aversive stimulus (or removes a pleasant one) to decrease behaviour.
• Describing the cognitive approach as ignoring biology. Modern cognitive neuroscience integrates biological and cognitive explanations.
• Presenting Freud's theory as scientific. Many of Freud's concepts are unfalsifiable and lack empirical support; Popper criticised psychoanalysis as a pseudoscience.
• Confusing the ego with the conscious mind. The ego is partly conscious and partly unconscious; it mediates between the id and superego.
• Assuming the humanistic approach is "better" because it respects free will. Each approach has strengths and limitations; the most comprehensive explanations often integrate multiple perspectives.

Practice Problems

Problem 1: Approach Comparison

Compare the biological and psychodynamic approaches in terms of their assumptions, methodology, and treatment of psychological disorders.

Assumptions:

The biological approach assumes that behaviour has a physiological basis (genes, neurochemistry, brain structure). Psychological disorders are viewed as illnesses caused by biological dysfunction (e.g., serotonin deficiency in depression, dopamine dysregulation in schizophrenia). The psychodynamic approach assumes that behaviour is determined by unconscious conflicts and early childhood experiences. Psychological disorders arise from unresolved conflicts between the id, ego, and superego (e.g., depression as anger turned inward, OCD as fixation at the anal stage).

Methodology:

The biological approach uses objective, quantitative methods: brain imaging (fMRI, PET), genetic studies (twin, family, adoption studies), biochemical analysis, and drug trials. The psychodynamic approach uses subjective, qualitative methods: clinical case studies, dream analysis, free association, and projective tests (e.g., Rorschach inkblots).

Treatment:

The biological approach treats disorders with pharmacological interventions (e.g., SSRIs for depression, antipsychotics for schizophrenia) and physical treatments (e.g., ECT, deep brain stimulation). Treatments are standardised, quick to administer, and effective for symptom relief but may have side effects and do not address underlying causes. The psychodynamic approach uses psychoanalysis (free association, dream interpretation, transference analysis) to bring unconscious conflicts into consciousness, enabling resolution. Treatment is long-term (years), expensive, and its effectiveness is difficult to evaluate empirically.

Comparison: the biological approach is more scientific and produces faster symptom relief, but it is reductionist and may not address the psychological causes of disorders. The psychodynamic approach addresses the meaning and origin of symptoms but lacks empirical support and is impractical as a widespread treatment.

Problem 2: Social Learning Theory Evaluation

Evaluate social learning theory as an explanation for aggressive behaviour.

Strengths:

1. Experimental support: Bandura's Bobo doll experiment (1961) demonstrated that children who observed an aggressive model were significantly more likely to imitate the aggressive behaviour. This finding has been replicated across cultures, supporting the theory's external validity.

2. Accounts for observational learning: SLT explains how aggression can be acquired without direct experience, which classical and operant conditioning cannot account for. This is important given that most aggressive behaviour is observed (media, family, peers) rather than directly reinforced.

3. Identifies mediational factors: SLT specifies the cognitive processes that determine whether observed behaviour is imitated (attention, retention, reproduction, motivation), making it more precise and testable than earlier behaviourist accounts.

Limitations:

1. Ecological validity: the Bobo doll experiment used an artificial situation (hitting an inflatable doll) that may not generalise to real-world aggression against other people. The consequences of hitting a Bobo doll differ from the consequences of hitting a person.

2. Biological factors are neglected: SLT does not account for biological influences on aggression (e.g., testosterone, serotonin, genetic predisposition). Aggression has a well-established biological component that cannot be explained by learning alone.

3. Individual differences: not all children who observe aggressive models imitate the behaviour. Individual differences in temperament, empathy, moral reasoning, and social context moderate the effect of observational learning, but SLT does not fully account for these differences.

Problem 3: Humanistic Approach Application

Explain how Rogers's person-centred approach would explain and treat a client experiencing low self-esteem and social anxiety.

Explanation:

Rogers would explain the client's low self-esteem and social anxiety as resulting from incongruence between the self-image and the ideal self. The client has developed a self-image that is negative ("I am unlikeable, incompetent, awkward"), while the ideal self is positive ("I want to be confident, popular, successful"). The large gap between the two creates chronic anxiety and low self-worth.

This incongruence likely arose from conditions of worth imposed by significant others (parents, teachers, peers) during childhood. The client internalised the message that they were only acceptable if they met certain standards (academic achievement, social conformity, physical appearance). Authentic experiences and feelings that did not meet these conditions were suppressed, leading to a distorted self-image and a lack of self-acceptance.

Treatment:

Rogers's client-centred therapy would aim to reduce incongruence and promote self-actualisation by providing three core conditions:

1. Unconditional positive regard: the therapist accepts the client without judgment or conditions, communicating that the client has inherent worth regardless of their achievements or behaviour. This counters the conditions of worth that have driven the incongruence.

2. Empathy: the therapist deeply understands the client's subjective experience from the client's frame of reference, reflecting feelings and meaning back to the client to facilitate self-exploration.

3. Genuineness (congruence): the therapist is authentic and transparent, modelling congruence between inner experience and outward behaviour.

Through this non-directive process, the client gradually internalises the therapist's unconditional acceptance, reduces reliance on external conditions of worth, and develops a more congruent, positive self-concept, reducing social anxiety and increasing self-esteem.

Problem 4: Cognitive vs. Behaviourist Approaches

Compare the cognitive and behaviourist approaches in terms of their view of mental processes, methodology, and treatment of depression.

View of mental processes:

The behaviourist approach either ignores internal mental states or considers them irrelevant to scientific psychology. Depression is explained purely in terms of learned behaviour: a reduction in positive reinforcement leads to withdrawal, which further reduces reinforcement (Lewinsohn's behavioural model). The cognitive approach places mental processes at the centre of its explanation. Depression is caused by negative schemas, cognitive distortions, and the cognitive triad (Beck), which distort the individual's perception of themselves, the world, and the future.

Methodology:

The behaviourist approach uses observable, measurable behaviour in controlled experiments (e.g., operant conditioning chambers, classical conditioning paradigms). The cognitive approach uses measures that infer mental processes from behaviour (e.g., self-report questionnaires, reaction time tasks, cognitive tasks, and increasingly, brain imaging to identify neural correlates of cognitive processes).

Treatment of depression:

The behaviourist approach treats depression through behavioural activation — increasing the patient's engagement in rewarding activities to break the cycle of withdrawal and reduced reinforcement. The cognitive approach treats depression through CBT — identifying and challenging negative automatic thoughts, cognitive distortions, and dysfunctional schemas, and replacing them with more realistic, balanced cognitions.

Comparison: CBT is generally more effective for depression than behavioural activation alone, because depression is maintained by cognitive as well as behavioural processes. However, behavioural activation is a component of CBT, and pure behavioural interventions have been shown to be effective for mild to moderate depression. The two approaches are complementary: CBT integrates cognitive restructuring with behavioural techniques.

Problem 5: Nature vs. Nurture Debate

Discuss the nature-nurture debate in psychology, referring to at least two approaches.

The nature-nurture debate concerns the relative contributions of innate biological factors (nature) and environmental influences (nurture) to behaviour and mental processes.

The biological approach represents the nature side of the debate. It argues that behaviour is primarily determined by genetic inheritance, neurochemistry, and brain structure. For example, the high concordance rates for schizophrenia in MZ twins ($\approx 48\%$) compared to DZ twins ($\approx 17\%$) suggest a substantial genetic component. The biological approach has produced evidence for the heritability of intelligence, personality traits, and psychological disorders.

The behaviourist approach represents the nurture side of the debate. It argues that all behaviour is learned through interaction with the environment (classical conditioning, operant conditioning, and observational learning). Watson famously claimed that he could take any infant and train them to become any type of specialist, regardless of their genetic inheritance. Bandura's social learning theory demonstrates that complex behaviours (including aggression) are acquired through observation and imitation of models.

Modern interactionist perspective: most contemporary psychologists reject the nature-nurture dichotomy and adopt an interactionist (diathesis-stress) approach. Behaviour is understood as the product of the interaction between genetic predispositions and environmental experiences. For example, Caspi et al. (2003) found that the effect of the 5-HTT gene on depression depended on the number of stressful life events experienced, demonstrating a gene-environment interaction. Neither nature nor nurture alone provides a complete explanation; both are necessary to understand behaviour.