Awareness of the outside world and of one’s own mental processes, thoughts, feelings,
Aware of other things about themselves.
States of Consciousness
Variations in what mental processes occur.
o Drug and alcoholinduced states
Sleep is a behavior and an altered state of consciousness.
We spend about a third of our lives in sleep.
o A basic issue is to understand the function of sleep.
Many of our behaviors display rhythmic variation.
o Circadian Rhythms
One cycle lasts about 24 hours (e.g. sleepwaking cycle).
Light is an external cue that can set the circadian rhythm.