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Chapter 4 Notes - Chapter 4 The Mind and Consciousness...

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Chapter 4 – The Mind and Consciousness Consciousness--awareness of the outside world AND own mental processes *How does neural activity in the brain give rise to consciousness? (we don’t know) Qualia—the properties of our subjective experiences. Each of us experiences consciousness subjectively - We cannot know if any two people experience the world in exactly the same way Ex: red? When you split the brain, do you split the mind? o The corpus callosum connects the brain’s hemispheres o Severing the corpus callosum produces split brain o Differences in right and left hemisphere function Left hemisphere: dominant for language Right hemisphere: 3 Levels of Consciousness: 1) Conscious level What you’re aware of at any given moment 2) Non-Conscious Level Things totally removed from consciousness Ex: HR, BP, digestion 3) Unconscious Level 2 Kinds of Unconscious: A) Preconscious Not in consciousness, but can be brought there by thinking about it. Ex: stored memories/facts B) Subconscious Inaccessible, but can still influence our behavior *Evidence for subconscious: 1) Mere exposure studies 2) Priming studies Mere Exposure “Familiarity breeds liking”—the more familiar something is, the more we like it Priming “preparing” for an event through subtle exposure, even “subliminal” exposure 3 Altered States of Consciousness 1) Sleep and Dreams
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EEG--electroencephalogram measures brain waves Brain waves vary along 2 dimensions: 1) Height--amplitude 2) Length--wavelength 6 stages of sleep 1) Stage 0 -relaxed with eyes closed -alpha waves 2) Stage 1 -irregular “awake” waves; theta waves 3) Stage 2 -sleep spindles and K-complexes 4) Stage 3 -delta waves begin 5) Stage 4 - more than 1/2 delta waves (Stage 3 and 4 are Slow-Wave-Sleep) -Stage 4 dreams are RARE -They are more “realistic”, less bizarre, can be about real events or things that your surroundings, and you can move. 6) REM sleep “active sleep” or paradoxical sleep -In REM sleep, EEG and physical activity resemble waking state.
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