Q: Which formula represents the calculation of the Weber fraction for a just noticeable difference?

$$\text{Weber\ fraction} = \frac{\text{JND}}{\text{Initial\ stimulus\ intensity}}$$

Question 1

Which of the following best describes the difference between sensation and perception?

Accepted Answer

Sensation is the stimulation of the sense organs, while perception is the selection, organization, and interpretation of sensory input.

Question 2

A person enters a kitchen and immediately notices a strong smell of garlic. After 10 minutes, they barely notice the smell. This phenomenon is best explained by which concept?

Accepted Answer

Sensory adaptation

Question 3

Which of the following is an example of synesthesia?

Accepted Answer

Seeing the number '5' as always being green

Question 4

According to Weber's law, if a person can just notice the difference between a 300-gram and a 310-gram weight, what is the Weber fraction for weight in this scenario?

Accepted Answer

$$\frac{10}{300}$$

Question 5

Which of the following best illustrates the concept of an absolute threshold?

Accepted Answer

The minimum amount of light needed for you to detect its presence 50% of the time

Question 6

A researcher is studying how much louder a sound must be for participants to notice a difference. This research is most closely related to which concept?

Accepted Answer

Just noticeable difference (JND)

Question 7

Signal-detection theory differs from classical threshold theory by emphasizing which of the following?

Accepted Answer

Detection depends on both sensory and decision processes, including factors like attention and noise.

Question 8

Which outcome in signal-detection theory occurs when a stimulus is present and the observer correctly identifies it?

Accepted Answer

Hit

Question 9

A person is exposed to a stimulus below their absolute threshold and later shows a change in behavior. This is an example of:

Accepted Answer

Perception without awareness

Question 10

Which of the following statements about subliminal messages is supported by research?

Accepted Answer

There is little to no evidence that subliminal messages have a significant effect.

Question 11

If a person with synesthesia involuntarily feels disgust when hearing a certain word, this is best described as:

Accepted Answer

Emotional synesthesia

Question 12

Which of the following best describes the just noticeable difference (JND)?

Accepted Answer

The smallest difference in stimulation that can be detected

Question 13

A person is lifting weights and can just notice the difference between 100 grams and 103 grams. According to Weber's law, what is the Weber fraction for this scenario?

Accepted Answer

$$\frac{3}{100}$$

Question 14

Which of the following is NOT a possible outcome in signal-detection theory?

Accepted Answer

Absolute threshold

Question 15

If a person is exposed to a constant background noise and eventually stops noticing it, which psychological process is responsible?

Accepted Answer

Sensory adaptation

Question 16

Which of the following best illustrates the application of signal-detection theory in a real-world scenario?

Accepted Answer

A radiologist deciding whether a faint shadow on an X-ray is a tumor, considering both the image and their own decision criteria.

Question 17

Which formula represents the calculation of the Weber fraction for a just noticeable difference?

Accepted Answer

$$	ext{Weber\ fraction} = \frac{	ext{JND}}{	ext{Initial\ stimulus\ intensity}}$$

Question 18

A person is exposed to a faint sound and sometimes reports hearing it, but sometimes does not. This variability is best explained by:

Accepted Answer

Signal-detection theory

Question 19

Which of the following is an example of perception rather than sensation?

Accepted Answer

Translating sensory input into something meaningful, such as recognizing a friend's face

Question 20

If a person can detect a difference between 200 grams and 206 grams, but not between 200 grams and 204 grams, what is the smallest detectable difference (JND) for this person at this weight?

Accepted Answer

6 grams

Chapter 4: Sensation & Perception – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards