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Physiological Approaches

Physiological Approaches - Physiological Approaches...

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Physiological Approaches
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Electrodermal Activity (EDA): Skin Conductance Most obtained by electrodes or sensors placed on the skin surface. Advantage: Noninvasive, no discomfort. Disadvantage: Movement constrained. Electrodermal activity: Due to increased sweat with arousal, skin conductance of electricity increases. Can measure responses to various stimuli, including sudden noises, emotionally charged pictures, pain, anxiety, fear, guilt. Some people show EDA in the absence of external stimuli— associated with anxiety and neuroticism.
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Cardiovascular activity Blood pressure: Measure of, e.g., stress reactivity. Heart rate: Increases with anxiety, fear, arousal, cognitive effort. Cardiac reactivity: greater than normal increase in blood pressure and heart rate when performing task such as backward serial subtraction. Associated with Type A personality- Impatience, competitiveness, hostility.
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Brain Activity Brain spontaneously produces small amounts of electrical activity. measured by electrodes on scalp—electroencephalograph (EEG). Evoked potential technique- Uses EEG, but the participant is given a stimulus and the researcher assess specific brain response to stimulus. Brain imaging techniques- Map structure and function of brain. Positron emission tomography (PET). Functional magnetic resonance imaging (fMRI).
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Physiologically Based Theories of Personality Extraversion-Introversion Sensitivity to Reward and Punishment Sensation Seeking Neurotransmitters and Personality Morningness-Eveningness Brain Asymmetry and Affective Style
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Extraversion-Introversion Measured by Eysenck Personality Questionnaire (EPQ). High extraversion: Talkative, outgoing, likes meeting new people and going to new places, active, bored easily, hates routine.
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