Arousal

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  • Arousal

    1. 1. Arousal
    2. 2. Aims • Define the term Arousal • Explain the physiological systems involved in arousal (fight-flight response) • Evaluate the uses and limitations of the polygraph
    3. 3. Arousal • What do you think of when you hear the word Arousal?
    4. 4. Among other things
    5. 5. Event Among other things
    6. 6. Event Among other things
    7. 7. Event Arousal - An organism's overall state of alertness and readiness for action Among other things
    8. 8. Event Arousal - An organism's overall state of alertness and readiness for action Among other things
    9. 9. Event Arousal - An organism's overall state of alertness and readiness for action Sympathetic Nervous System Among other things
    10. 10. Event Arousal - An organism's overall state of alertness and readiness for action Sympathetic Nervous System Among other things
    11. 11. Event Arousal - An organism's overall state of alertness and readiness for action Sympathetic Nervous System Among other things
    12. 12. Event Arousal - An organism's overall state of alertness and readiness for action Sympathetic Nervous System Among other things My lead to......
    13. 13. Event Arousal - An organism's overall state of alertness and readiness for action Sympathetic Nervous System Among other things My lead to......
    14. 14. Physical Threat Fight or Flight
    15. 15. Physical Threat Fight or Flight The ANS (sympathetic NS) prepares us for quick action. We must make a choice
    16. 16. Physical Threat Fight or Flight The ANS (sympathetic NS) prepares us for quick action. We must make a choice
    17. 17. Physical Threat Fight or Flight The ANS (sympathetic NS) prepares us for quick action. We must make a choice
    18. 18. Physical Threat Fight or Flight The ANS (sympathetic NS) prepares us for quick action. We must make a choice
    19. 19. Physical Threat Fight or Flight The ANS (sympathetic NS) prepares us for quick action. We must make a choice
    20. 20. Psychological Threat Fear of Failure This triggers a physiological arousal brought about by activation of the sympathetic nervous system
    21. 21. • Think of a time when you were confronted with psychological and physical threat. • How did your body react? • Did you have conscious control over your body?
    22. 22. Measuring Arousal It is possible to measure physiological changes associated with arousal. The most common divice for measuring physiological changes is the polygraph. This device records changes in: • Heart rate • Blood pressure • Breathing rate • Electrical conductivity of the skin called galvanic skin response (GSR), this reflects sweat gland activity
    23. 23. Lie detection As a general measure of arousal the polygraph is often used as a lie detector. Its success depends on one big assumption. Assumption It is assumed that lying produces and increase in arousal.
    24. 24. Using the polygraph for lie detection When using a polygraph a person is asked two types of questions. Control Questions Are used to establish a baseline physiological response. Some questions are routine and ‘non-emotional’ what is your name? Others are intended to increase your arousal slightly for example ‘Have you ever stolen from your employer?’ Relevant Questions Are those that relate to the reason for the test.
    25. 25. • The individual’s pattern of physiological responses to control questions is compared with their pattern of physiological responses to relevant questions.
    26. 26. USING YOUR BUM TO BEAT THE LIE DETECTOR
    27. 27. USING YOUR BUM TO BEAT THE LIE DETECTOR

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