8.1.14

Idiographic & Nomothetic Approaches

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Nomothetic Approaches

Nomothetic is an approach that focuses on the whole population.

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Nomothetic research

  • Nomothetic research tries to find universal laws that can be applied to whole populations of people.
  • Mostly, the research entails quantitative research in the form of laboratory studies and correlational research. Statistical data is powerful because it is generally reliable and valid.
  • From these studies, general laws and theories of human behaviour can be made.
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Strengths of nomothetic research

  • Nomothetic research has strengths, depending on the needs of the research.
  • As nomothetic research is quantitative, it is a highly scientific approach.
    • The studies can be highly controlled, avoid extraneous variables and bias.
    • Objective data can be obtained rather than subjective data.
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Weaknesses of nomothetic research

  • Studies that use scientific research, such as laboratory studies, also tend to have low ecological validity.
    • This means it is rare that the results can validly be applied to real life.
  • By examining the whole population, some details are going to be missed or ignored.
  • Behaviour that does not fit into the norm of the general laws created is sometimes not explained.

Idiographic Approaches

Idiographic approaches focus on the individual.

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Idiographic research

  • Idiographic research focuses on individuals.
    • (Remember ‘I’ for individual).
  • It looks at the individual in detail.
  • This research relies on qualitative methods such as questionnaires, case studies, interviews and observations of individuals.
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Strengths of idiographic research

  • Idiographic research can be useful in different cases.
  • By focusing on the individual, a more complete explanation is likely compared to the nomothetic approach.
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Weaknesses of idiographic research

  • By focusing on individuals, such as in case studies, it is difficult to generalise findings to a whole population.
  • Idiographic research is usually qualitative, so it can be more subjective. For this reason, it can be seen as less scientific than nomothetic research.
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Exceptions

  • There are some exceptions.
    • Certain case studies have been foundational in developing nomothetic laws and theories.
    • A famous example of idiographic research that generated nomothetic ideas is the case study of H.M. (Milner et al, 1957).
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(Milner et al. 1957)

  • H.M was a man who suffered from severe epilepsy.
  • The doctors treated him by removing the area of the brain responsible for the seizures - in this case, the hippocampus.
  • After the surgery, he had difficulty forming new long-term memories.
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(Milner et al. 1957) conclusions

  • They concluded that the hippocampus is important in the formation of long-term memories.
  • This concept could be applied to everyone. So an idiographic conclusion had nomothetic applications.

Psychological Approaches - Idiographic-Nomothetic Approaches

There are five general approaches to psychology: psychodynamic, biological, cognitive, behaviourist and humanistic. These approaches fall along the idiographic-nomothetic approaches.

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The psychodynamic approach

  • The psychodynamic approach has both idiographic and nomothetic tendencies.
  • The approach is idiographic because Freud studied behaviour in individuals (such as Little Hans) in case studies.
  • These case studies were then used to develop broader, nomothetic laws.
  • Freud’s theory of psychosexual development was based on these studies, but Freud believed they could apply to everyone.
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The biological approach

  • The biological approach is nomothetic.
  • Its aim is to develop theories regarding biological function, structures and processes in everyone.
  • The approach assumes that human physiology is basically the same across a whole population, making it nomothetic.
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Biological examples

  • For example, by discovering the localisation of brain structure, we can assume that the vast majority of people have the same brain structure.
  • Another example would be neuron structure being consistently the same across humanity.
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The cognitive approach

  • The cognitive approach is also nomothetic.
  • Cognitive research looks at the mental processes of humans.
  • It assumes that the processes are largely the same across the population.
    • For example, Piaget’s theory of cognitive development can broadly be applied across all humans. We all, basically, go through the same stages of development.
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The behaviourist approach

  • The behaviourist approach is also nomothetic
  • Behaviourists look for cause and effect laws. These laws can be applied across a population.
    • For example, Skinner’s operant conditioning principles of learning through positive and negative reinforcement can be generalised to an entire population.
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The humanistic approach

  • Finally, the humanistic approach is really the only one that falls completely on the idiographic side.
  • Humanism focuses on the individual as they strive towards self-actualisation.
  • Most studies involve qualitative research.

Jump to other topics

1Social Influence

2Memory

3Attachment

4Psychopathology

5Approaches in Psychology

6Biopsychology

7Research Methods

8Issues & Debates in Psychology (A2 only)

9Option 1: Relationships (A2 only)

10Option 1: Gender (A2 only)

11Option 1: Cognition & Development (A2 only)

12Option 2: Schizophrenia (A2 only)

13Option 2: Eating Behaviour (A2 only)

14Option 2: Stress (A2 only)

15Option 3: Aggression (A2 only)

16Option 3: Forensic Psychology (A2 only)

17Option 3: Addiction (A2 only)

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