Comparison of Approaches Part 2 (AQA A-Level Psychology): Revision Notes

Comparison of Approaches Part 2

Criterion 4: Idiographic and nomothetic approaches

This criterion examines whether psychological approaches focus on understanding individuals uniquely (idiographic) or aim to establish universal principles that apply to everyone (nomothetic).

Key definitions

How each approach compares

Biological approach adopts a nomothetic stance because it assumes humans share common physiological and biochemical processes. Research focuses on identifying general patterns in brain structure and function that explain behaviour across populations. Case studies are used primarily to test broader theories rather than understand individuals.

Learning approach is also nomothetic as it seeks to establish universal laws of behaviour, such as principles of conditioning. The approach assumes that learning processes operate similarly across all individuals, allowing researchers to generalise findings widely.

Cognitive approach takes a nomothetic position by studying mental processes scientifically across groups of participants. Despite recognising individual differences in thinking, the approach aims to identify general principles of cognitive processing that can be applied universally, often using computer analogies.

Humanistic approach is firmly idiographic, emphasising the uniqueness of each individual. Humanistic psychologists argue that people cannot be meaningfully compared or generalised about, as each person's subjective experience is fundamentally different. The approach might include some nomothetic elements like Maslow's hierarchy of needs, but primarily maintains an idiographic focus.

Criterion 5: Scientific methods

This criterion evaluates how scientific and objective each approach's research methods are, considering whether they use standardised procedures and reliable measurement techniques.

How each approach compares

Biological approach employs highly scientific methods including brain scanning technology, biochemical measurements, and controlled laboratory experiments. Techniques like measuring neurotransmitter levels and using brain imaging provide objective, quantifiable data that can be reliably replicated.

Learning approach uses scientific methods when studying observable behaviours, as these can be measured objectively. However, social learning theory elements are less scientific since they involve studying mental processes that cannot be directly observed, making them more susceptible to researcher bias.

Cognitive approach relies on well-controlled laboratory experiments that produce reliable data. However, since thoughts and mental processes cannot be directly observed, researchers must infer cognitive activity from behaviour, which introduces potential for bias and reduces scientific objectivity compared to biological measures.

Humanistic approach deliberately avoids scientific measurement, arguing that treating humans as scientific subjects is inappropriate. Humanistic psychologists believe each person is unique and cannot be meaningfully measured or compared using standardised scientific methods.

Criterion 6: Extrapolation

This criterion examines whether approaches use animal research to understand human behaviour, based on the assumption that findings can be generalised between species due to shared biological characteristics.

How each approach compares

Biological approach extensively uses animal research because it views humans and animals as having fundamentally similar physiology and brain structure. Studies on animal brain function, neurotransmitters, and behaviour are considered valid for understanding human psychological processes.

Learning approach developed many principles through animal experimentation, particularly classical and operant conditioning studies. The approach assumes that basic learning mechanisms operate similarly across species. However, social learning theory focuses specifically on human social behaviour and doesn't rely on animal studies.

Cognitive approach rarely uses animal research because it examines complex thought processes like memory, language, and problem-solving that are uniquely human or significantly more developed in humans. While some basic perception studies use animals, this is exceptional rather than typical.

Psychodynamic approach cannot meaningfully use animal research because it focuses on unconscious mental processes, childhood experiences, and complex human relationships that would be impossible to study in animals or translate meaningfully to human experience.

Humanistic approach does not use animal research because it emphasises uniquely human characteristics like self-actualisation, personal growth, and subjective experience. The approach focuses specifically on human development and conscious experience, making animal studies irrelevant to its goals.