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Unformatted text preview: Chapter Six Psychology Notes States of Consciousness The Puzzle of Consciousness- consciousness- the moment to moment awareness of ourselves and our enviroment o subjective and private- experiences are different for everyone o dynamic (ever- changing)- variety of states each day o self- reflective and central to our sense of self- the mind is aware of its own consciousness- ultimately; conciousness is connected with selective attention Measuring states of consciousness- self- report- most commonly used- psychological measures- establish correspondence between bodily states and mental processes o they are objective- cannot tell what a person subjectively is feeling Levels of consciousness: Psychodynamic and cognitive perspectives- human mind consists of three levels of awareness - the conscious- thoughts perceptions, in which we are aware of- preconcious- outside current awareness, but can be recalled- unconscious- cannot be brought into our conscious the cognitive unconscious- view concouis and unconscious metal life as completmentary forms of information processing controlled versus automatic processing- controlled (effortful) processing- the voluntary use of attention and conscious effert- automatic processing- can be preformed with little or no conscious effort o routine actions o disadvantage- reduces our way of finding new ways to approach a problem divided attention- can perform more than one activity at the same time the emotional unconscious- emotional and motivational processes operate unconsciously Circadian rhythms: Our daily biological clocks- circadian rhythms- daily biological clocks keeping time: brain and the enviroment- suprachiasmatic nuclei (SCN)- regulates the circadian rhythms- brains clock- located in the hypothalamus- they link to the tiny pineal glands which secretes melatonin- hormones that has a relaxing effect - SCN neurons are active during the day and reduce the pineal glands secretion of melatonin Environmental disruptions of circadian ryhthums - seasonal affective disorder (SAD)- cycle tendendy to beome psychologically depressed during certain months of the year Sleeping and Dreaming- circadian rhythms do not regulate sleep directly- by decreasing our knighting alterness they promotes a readiness for sleep and help determin the optimal time period where we can sleep most soundly Stages of sleep- every 90 minutes while asleep we cycle through different stages- beta waves- EEG recordings can show thesewhen u are awake and alert have high frequency but low height 15-30 cps- as you begin to relax or sleep ur brain waves slow down and alpha waves occur at 8-12 cps Awake- Beta waves Relaxed- Alpha waves Stage 1- theta waves 3.5 7.5 cps only few mintues Stage 2- sleep spindle 12-15 cps Stage 3- delta waves .5- 2cps as time passes they occur more often and when delta waves dominate the EEG pattern this indicates that you have reached stage four Stage 4- delta waves Stage 3-4 are known as slow- wave sleep After 20-30 mins of stage 4 your EEG pattern changes and...
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This note was uploaded on 10/12/2009 for the course MIT 2000 taught by Professor Da during the Spring '09 term at Acadia.
- Spring '09