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PSYC 2740 Midterm: Midterm 2 - Study Notes

8 Pages

Course Code
PSYC 2740
Lewis Stephen

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MIDTERM 2 STUDY NOTES CHAPTER 7: Physiological Approaches to Personality Electrodermal Activity: provides a measure of sympathetic nervous system (skin conductance) Place 2 electrodes on the skin and put electrode into one hand and measure conductance on the other Nock Mendes study on skin conductance selfinjury o Wanted to know if emotional reactivity to stressful experiences differ for people that selfharm o Participants had to do a card matching game where everyone was told that they were wrong o This was done to see how long people can tolerate distress from a negative feedback for o People who self harm have elevated skin conductance and more negative reactivity to stress Cardiovascular Activity Blood Pressure and Heart Rate Cardiac Reactivity: increase in BP and heart rate while in stress (linked with Type A personalityhostile) Brain Activity Electroencephalogram (EEG): measures brain activity via electrodes using a brain cap Functional Magnetic Resonance Imaging (fMRI): show images of areas of brain activity (ex. Limbic Activation) o Neuroticism is correlated with increased frontal brain activation to negative images o Extraversion is correlated with increased frontal brain activation to positive images Eysencks Original Theory: looked at differences in extraversionintroversion when gateway in spine is open or closed using the ascending reticular activation system (ARAS) Introversion has higher resting cortical arousal (ARAS lets in too much) Extroversion has lower resting cortical arousal (ARAS lets in too little) Eysencks Revised Theory: believed that those high in introversion or extraversion dont have different resting states of arousal and that the difference lies in degrees of arousal Behavioural Activation System: response to rewards and regulates approach behaviour (impulsivity) Behavioural Inhibition System: responsive to punishment, uncertainty and motivates inhibitionavoidance (anxiety) Monoamine Oxidase (MAO): regulates levels of neurotransmitters by breaking it down Too little MAO = too much neurotransmitter Too much MAO = too little neurotransmitters Clongingers Tridimensional Personality Model Low dopamine in novelty seeking Low serotonin in harm avoidance Low norepinephrine in reward dependence
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