Personality Psychology Chapter 7

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Personality Psychology: Domains of knowledge about Human Nature by R.J. Larsen/D.M. Buss MacEwan University
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Questão Responda
Phineas Gage man with iron rode through brain
physiological systems the NS, cardiac S, musculoskeletal system
personality and physiology different physiological traits create difference, indicate differences to psychological functioning
men w/ long index fingers impulsive, thrill seeker, increased testosterone
women with a longer ring finger then index or middle higher dominance
physiological personality psychologist measure physical systems - heart rate, brain waves
theoretical bridge researchers need to build connection b/w personality and biological dimensions in order to explain physiological concepts in personality
electrodes placed on surface of participant's skin linked to polygraph, to measure physiological variables
telemetry a process by w/h electrical signals are sent to participants to polygraph through radio waves instead by wires
3 physiological measures 1) electrodermal activity 2) cardiovascular 3) activity in brain
electrodermal or skin conductance more water in the skin carries electrical signals makes it possible to measure ANS directly
Cardiovascular Activity blood pressure: diastolis (resting pressure b/w pumps) + Systolic (max. pressure during pumps), heart rate: beats/ minute (BPM)
Cardiac reactivity blood pressure raising above the average mean in an activity
Type A personality Bhav pattern characterized by impatience, competitiveness, hostility, chronic cardiac reactivity
Brain Activity EEG: measures regional brain activity can provide useful info. about patterns of activation of regions of brain associated w/ info-processing tasks
evoked potential techniques participants given stimulus, EEG assesses responsiveness
personality neuroscience use of fMRI, PET, frontal brain activation from positive images, sizes of various structures influence personality
biochemical measurements blood: MAO regulating neurotransmitters, saliva: immune system+ cortisal
H.J. Eysenck, 1967 Biological Basis of Personality introverts have higher levels of activity in ARAS: ascending reticular activating system
introverts, ARAS higher resting arousal level of cortical higher, already at a heightened level of arousal
Optimal level of arousal Eysenck and Hebb introverts and extroverts have specific individual levels of arousal
arousability arousal response, not a baseline arousal level is diff. b/w introverted and extroversion
extroverts prefer higher levels of stimulation than introverts
Jeffrey Gray reinforcement sensitivity theory from research on animals a model of human personality based on BAS, BIS
BAS: Bhav activation system responds to incentives, reward and regulates approach Bhav
BIS: BHav inhibition system responds to punishment, frustration, uncertainty, avoidance Bhav
anxiety BIS is responsible for personality dimension of anxiety
impulsivity BAS is responsible for personality dimension of impulsivity, inability to inhibit responses
extroverts prefer what type of loudness when learning 72 decibels
introverts prefer what type of loudness when learning 55 decibels
Equivalence b/w Gray's & Eysenck's constructs Extroversion = BAS Neuroticism = BIS
low BIS exhibits characteristics of: little regard for safety, took risks, disregard for danger
high BIS characteristics: panic attacks, anxiety disorders, high anxiety
extroverts have weak BIS meaning... they find it harder to learn from punishment, instead learn better from reward
Sensation seeking tendency to seek thrilling and exciting activities, takes risks, avoid boredom
sensory deprivation being put into a small chamber where no light, sound, w/ minimal tactile sensations, for 12 hours
Hebb's theory of Optimal Arousal ppl are motivated by optimal level of arousal, if they are under aroused, it is rewarding to become aroused, need to seek tension
Zuckerman's sensory deprivation some people do badly at this task b/c they have a high need for sensation and arousal, Sensation-Seeking Scale
4 Sensation-Seeking Scale high or low in these categories: 1)Thrill and adventure seeking 2) Experience seeking 3) Disinhibition 4) Boredom susceptibility
comorbidity 2 or more disorders simultaneously occur w/in same individual
Neurotransmitters chemicals in nerve cells responsible for transmission of nerve impulse from 1 cell to another
Monoamine oxidase MAO responsible for maintaining proper levels of neuroTs, by breaking down other neuroTs, too little= shaking or nervous, too much= lethargic
high sensation seekers and MAO low MAO levels, need to seek optimal levels of arousal, but having too little biochemical brakes in synapse
Dopamine related to pleasure, functions as a reward system
Serotonin role in depression, mood disorders, anxiety, SSRI`s block reuptake of serotonin; more S = dominance, and grooming; less S= anxiety+ aggression
norepinephrine activates the SNS, flight or fight
3 tridimensional personality model Cloninger`s 3 personality traits are tied to 3 neuroTs 1)novelty seeking = dopamine 2) harm avoidance = serotonin metabolism 3) reward dependance = low levels of norepinephrine
DRD4 type 4 dopamine receptor associated with heightened levels of novelty seeking
morningness-eveningness the difference b/w a morning and evening person, difference in biological rhythms
circadian rhythms CRs body temperature and endocrine system, temporal isolation design to study CRs- isolate the person in solitude to go to bed, eat, drink whenever they want
free running no time cues to influence your Bhav/ biology: average- 24-25 hour, short as 16, long as 50
electroencephalongraph EEG records electrical activity
alpha wave oscillates 8-12 times, calm and relaxed
frontal brain asymmetry asymmetry in activity in left & right part of frontal Hemp. pleasant emo on left H w/ right emo on right H.
cortisal stress hormone, prepares body for fight & flight
right side activation w/ eyes link to... fear
left-sided brain activation w/ eyes has been correlated to... positive emotions and reduced stress, ex. highest Tibetan monk

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