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Lecture 5

PSY230H1 Lecture 5: Lecture 5 PSY 230

Course Code
Amanda Sharples

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Lecture 5
Infants are born with different personality therefore it is important to talk about the biological
Eysenck’s Hierarchical model
2 factors: one is the heritability, the heritage factor and another is about how your body is
responding to it, and about the physiological arousal.
The personality traits are determined by both the biological and the environment.
He actually proposed fewer than 5 actually. Some are consistent with the 5 model.
Psychoticism: agreeableness and conscientiousness could be included in the psychoticism. (he
argues that this has to be very disagreeable and low in conciseness)
He also argues that the openness is a poor measure of the intelligence, and we have already
have intelligence as a separate cognitive difference, we really don’t need that to be another
factors here.
Eysenck’s Hierarchical model:
Habitual response level: you are nervous when you go to PSY 230 exam Vs do you always feel
nervous when you go to exams.
If you feel anxious when you take an exam, you maybe feel very nervous when you are asked to
give a speech.
Trait level: do you tend to have a lot of interaction with other people.
Super trait level: do you tend to behave impulsiveness excitable.
The extraversion is the super traits.
The super-trait that has subsets, and those sub traits are related with each other, those are the
big 5 traits.
Eysenck’s Hierarchical model:
He initially thought it is related with excitation and inhibition.
He argued in general that this has to do with the cortical activity.
The research has been finding the arousal level. But did not to the rewards and punishment
responding differences
Extroverts like loud music.
Introverts experiencing less happiness than the extroversion.
Yerkes-Dodson law: there is an optimal level of arousal that people need to get at in order to
act their best. If you are too under-aroused, you are not able to perform well, but if you are too
excited (over aroused), you feel a lot of anxiety, you are not going to perform very well.

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There is a curve, if you want to perform the best, you want to be in the middle of the curve. You
need to be in the middle.
Extroverts tends to do better when there is more arousal.
Introverts are just more arousal. They are more likely to focused in the inside.
Impulsivity, extroverts. They need to bring their level of arousal up.
Eysenck’s Hierarchical model:
Neuroticism- Emotional Stability
They are more stress in life. More likely to go to the fight and flight state.
Fight and flight states related to the activation of the sympathetic nerve system. This is when
your heart rate is increasing, and you are stating pumping more blood to your body, and usually
activated due to a threat in your environment, and you need to response and get away from it.
But sometime we react due to day to day stresses.
People who are neurotic, they are more likely to
Hart rate, blood presser, sweating.
If you are stressed, make your blood harder to flow.
The way to test arousal.
Eysenck’s Hierarchical model:
The circle: if someone is introverted and stable, this person is more likely to be calm, reliable,
and thoughtful. If a person is introverted but unstable: they will be moody, anxious…
20 years after his theory, he added the Psychoticism VS Normality
Throwing the garbage in the bin, hold the door. Those are the norms that we are follow.
We are aware of those social norms, but if you are high on the psychoticism you are more likely
to break those rules and does not care of those things. For example: people are always lie.
People in favor of the big 5. Saying that should be breakdown into 2 traits instead of this big
The testosterone has always related to aggression. Status seeking behaviour.
This could be also be related with the dark triad.
The connection between the Eysenck’s and big 5.
Gray’s reinforcement sensitivity theory
There are 3 systems that guide human behaviour. BAS.BIS, and flight and fight.
BAS: approach things. BIS: This is believed this is what caused the anxiety.
BAS: they are focusing the things that may give them rewards. People who is high in BAS, they
are getting more frustrated when they have some hard time to pursue some goals.
Neuroticism are related to the BIS.
Extraverts believe things are going to be rewarding to them, related to the BAS.
Extraverts are more impulsively.
Dopamine are related to the rewards.
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