Psychology 100 Chapter 4 Flashcards Preview

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Flashcards in Psychology 100 Chapter 4 Deck (295)
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1

What is sensory branding?

Advertising by promoting the product through five senses.

2

Define sensation

simple stimulation of a sense organ

3

Define perception

The organization, identification, and interpretation
of a sensation in order to form a
mental representation.

4

Define transduction

What takes place when many sensors in
the body convert physical signals from the
environment into encoded neural signals
sent to the central nervous system.

5

Are sensation and perception the same?

no

6

What happens first? Sensation or perception?

sensation

7

What role does the brain play in what we see and hear?

The brain makes sense out of words through perception and concepts

8

How do sensory receptors communicate with the brain?

By the process of transduction

9

Define psychophysics

Methods that measure the strength of a stimulus and the observer's sensitivity to that stimulus

10

Define absolute threshold

The minimal intensity needed to just barely detect a stimulus in 50% of the trials

11

Define just noticeable difference (JND)

The minimal change in a stimulus that can just barely be detected

12

Define Weber's law

The just noticeable difference of a stimulus is a constant proportion despite variations in intensity

13

Why isn’t it enough for a psychophysicist
to measure only the strength of a stimulus?

Because although two people may both describe their experience of the sunset in the same words, neither of them can directly perceive the other's experience of the same event

14

What is the simplest quantitative measurement in psychophysics?

Absolute threshold

15

As the intensity of the sensory stimulation _____ , we detect the stimulation more _______

As the intensity of the sensory stimulation increase, we detect the stimulation more frequently

16

Why are some of us able to detect sensory stimulation below our own absolute threshold?

Because some of us are more sensitive than others

17

Is JND a fixed quantity?

No

18

What are two things the just noticeable difference (JND) depend on?

Depends on how intense the stimuli being measure are and on the particular sense being measured

19

What is the importance of proportion to the measurement of just noticeable difference?

It is important for calculating the difference in threshold

20

Who created the Weber's law and how?

Fechner created the Weber's law using Weber's insight

21

Who noticed the relation between the proportion between stimuli when calculating a different threshold?

Weber

22

How accurate and complete are our perceptions of the world?

Our perceptions is somewhat haphazard (careless, random)

23

What affects our ability to perceive? 1 thing

Noise

24

What affects our ability to sense things? 3 things

Memories, mood and motives

25

Define signal detection theory

The response to a stimulus depends both on a person's sensitivity to the stimulus in the presence of noise and on a person's response criterion

26

Define sensory adaptation

Sensitivity to prolonged stimulation tends to decline over time as an organism adapts to current conditions

27

What happens if the sensory evidence exceeds a person's criterion?

It means that the person has detected the stimulus

28

What happens if the sensory evidence falls short of a person's criterion?

It means that the person has NOT detected the stimulus

29

What allows researchers to quantify an observer's response in the presence of noise? 1 thing

Signal detection theory

30

What does it mean by "hit" in a signal detection experiment?

The subject is exposed to the stimulus and has acknowledge its existence.