pschty test chapters 4-5

trichromatic theory

The trichromatic theory of color vision says that we see colors because our eyes have three types of color sensors (cones) that detect red, green, and blue light. By mixing these three colors, our brain creates all the colors we see.

parallel processing

is when a system, like the brain or a computer, handles multiple tasks or pieces of information at the same time. Instead of doing one thing after another (sequentially), it processes things in parallel, or simultaneously.

absolute threshold

The absolute threshold refers to the smallest amount of stimulus (like sound, light, or touch) that a person can detect at least 50% of the time. It's the point where something goes from being undetectable to detectable.

consciousness

an individual’s awareness of external evens and internal sensations under the condition of arousal

global brain workspace

It suggests that consciousness arises when information is shared across different brain regions, allowing for widespread access to various parts of the brain, like memory, perception, and decision-making.

attention

is the process of focusing awareness on a narrowed aspect of the environment

signal detection

decisions when trying to detect a faint or uncertain signa

stage n1

when a person is just dozing. may include fallin sensation and sudden muscle movements

stage r

an active stage of sleep. REM. fast wake patterns in eeg

figure ground relationship

is how our brain separates what we focus on (the figure) from the background (the ground).

stage n2

no longer consciously aware of the enviorment around. eeg will show sleep spindles

stage w

a person awake. eeg has alpha and beta waves

light

a form of electromagnetic energy, travels in waves

sensory adaptation

a change in responsiveness due to stimuli

stream of consciousness

is a continuous flow of sensations images thoughts and feelinsg

controlled processes

most alert states of human conciousness where they focus on their goals

biological rythms

periodic rythms of the body that are annual or seasonal

stage n3

characterized by delta wave patterns. considered deepest sleep

there is a ___ correlation between loliness and sleep

positive

Periodic fluctuations in the body are known as

biological rhythms

narcolepsy

Narcolepsy is a sleep disorder that causes overwhelming daytime drowsiness and sudden, uncontrollable episodes of falling asleep.

manifest content

refers to the actual, literal storyline or events that are visible in a dream or other form of content. It’s what you see or remember directly, without interpreting its deeper meanings or symbols.