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Psychology ­ Unit 3 ­ Development of Personality

Key Words

Personality: the thoughts, feelings and behaviours that make an individual
unique.
Temperament: the genetic component of personality.
Longitudinal Study: a study carried out to show how behaviour changes over
time.
Monozygotic Twins: twins developed from one fertilised egg.
Dizygotic Twins:…

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Conclusion: These ways of responding to the environment stayed with the
children as they developed. Thomas, Chess and Birch therefore concluded that
temperament is innate.


Evaluation: As this was a longitudinal study, it leaves time for participants to
drop out, leaving alterations and problems in the results. As the participants…

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Also, behaviour was observed and recorded by the researchers and they may
have missed some key behaviours that could have produced different results to
those obtained.



Eyesenck (1947)

Aim: To investigate the personality of 700 servicemen.
Method: Each soldier completed a questionnaire. Eyesenck analysed the
results using a statistical technique…

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Biological causes of APD




The amygdala is located in the limbic system and is in the temporal lobe of the
brain. It is involved in memory and emotion, particularly fear.
The outer layer of the brain is known as the cerebral cortex or grey matter.
This includes regions of the…

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Raine et al (2000)

Aim: To support the theory than abnormalities in the prefrontal cortex cause
APD.
Method: MRI (Magnetic Resonance Imaging) was used to study 21 men with
APD and a control group of 34 healthy men. The subjects were all volunteers.
Results: The APD group and an 11%…

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Conclusion: Socioeconomic factors lead to the development of anti-social
behaviour.

Evaluation: As the study was not a controlled experiment, other factors (like
biological explanations) were not investigated. Also, the researchers in the
study interviewed the participants and people close to the participants; they
may have been inclined to give socially…

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