Perceptual Systems Flashcards Preview

Sensations and Perceptions > Perceptual Systems > Flashcards

Flashcards in Perceptual Systems Deck (18)
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1
Q

Sensation

A

the process by which we receive information from the environment

2
Q

Sensation involves coordination among:

A

a. receptors
b. neural pathways
c. sensory pathways

3
Q

Perception

A

process of selecting information from the environment and the interpretation of information from the environment

4
Q

Distinction unnecessary:

A

Perceptual systems= neurons and previous experience

5
Q

Psychophysics

A

the subfield that focuses on the relationship between physical stimuli and people’s conscious

6
Q

Absolute Threshold

A

the point at which a stimulus can be detected 50% of the time. given a particular stimulus, the minimum stimulation needed for detection

7
Q

Difference Threshold (jnd)

A

the minimum change in stimulation that can be reliably detected ~50% of the time

8
Q

Weber’s Law

A

jnd is constant, fraction (K) of the intensity of the stimulus

9
Q

Signal Detection Theory

A

perception is dependent on intensity of stimuli and on observer motivation

10
Q

Subliminal Perception

A

perception below the threshold of awareness

11
Q

Selective Attention

A

a. inattentional blindness-the failure to notice a fully-visible, but unexpected object because attention was engaged on another task, event, or object.
b. change blindness- failure to learn difference of change

12
Q

Divided Attention

A

Dichotic Listening- trying to pay attention to two things at once (Cocktail Party Effect)

13
Q

Transducers

A

converting one form of energy into another (aka receptor cells)

14
Q

Forms of environmental info.

A

air vibrations, gases, chemicals, tactile pressures, electromagnetic waves

15
Q

Sensory Adaptation

A

a decline in receptor activity when stimuli are unchanging

16
Q

Dark Adaption

A

photopigments need time to regenerate (~20 mins)

17
Q

Olfactory Fatigue

A

fatigue of sensory receptors in the nose (sensory stimulus does not change so we don’t pay attention to it)

18
Q

Sensory Deprivation

A

a. isolation from sight, sounds, smells, tastes, and feeling

b. bored, irritable, hallucinate