Q: Weber's Law states that for two stimuli to be perceived as different, they must differ by a minimum percentage. If the just noticeable difference (JND) for weight is 2%, what is the JND for a 200g object?

$$JND = 200 \times 0.02 = 4\,g$$

Question 1

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

Accepted Answer

Sensation is the process of detecting physical energy from the environment and encoding it as neural signals, while perception is the process by which the brain selects, organizes, and interprets this information.

Question 2

Which of the following is an example of an absolute threshold?

Accepted Answer

The smallest amount of perfume in a large room that a person can detect 50% of the time.

Question 3

Weber's Law states that for two stimuli to be perceived as different, they must differ by a minimum percentage. If the just noticeable difference (JND) for weight is 2%, what is the JND for a 200g object?

Accepted Answer

$$JND = 200 	imes 0.02 = 4\,g$$

Question 4

Which of the following best explains sensory adaptation?

Accepted Answer

The reduction or disappearance of sensory responsiveness when stimulation is unchanging or repetitive.

Question 5

Which structure in the eye is responsible for controlling the amount of light that enters?

Accepted Answer

Pupil

Question 6

What is the main function of rods in the retina?

Accepted Answer

Detecting dim light and peripheral vision

Question 7

Which theory of color vision explains how the retina's red, green, and blue-sensitive cones respond in varying degrees to different color stimuli?

Accepted Answer

Trichromatic theory

Question 8

Which Gestalt principle explains why we tend to perceive incomplete shapes as complete objects?

Accepted Answer

Closure

Question 9

A patient reports feeling sensations in a limb that has been amputated. What is this phenomenon called?

Accepted Answer

Phantom limb syndrome

Question 10

Which of the following best describes top-down processing?

Accepted Answer

Processing that uses prior knowledge and expectations to interpret sensory information.

Question 11

Which sensory system is responsible for detecting body position and movement?

Accepted Answer

Kinesthesia

Question 12

Which of the following is NOT a function of cones in the retina?

Accepted Answer

Peripheral vision in dim light

Question 13

Which process allows us to perceive objects as having a constant size, shape, or color despite changes in sensory input?

Accepted Answer

Perceptual constancy

Question 14

Which of the following best describes the opponent-process theory of color vision?

Accepted Answer

Color perception is controlled by opposing pairs: red-green, blue-yellow, and black-white.

Question 15

Which structure in the ear is responsible for transmitting sound vibrations to the cochlea?

Accepted Answer

Ossicles (bones)

Question 16

Which of the following is an example of bottom-up processing?

Accepted Answer

Reading a word by first identifying each letter and then combining them.

Question 17

Which chemical senses are responsible for detecting taste and smell?

Accepted Answer

Olfaction and gustation

Question 18

Which of the following best describes the function of the vestibular system?

Accepted Answer

Maintaining balance and spatial orientation

Question 19

If a person can detect a change in temperature from 20°C to 22°C, but not from 20°C to 21°C, what is the difference threshold for temperature for this person?

Accepted Answer

$$2\,^{\circ}\mathrm{C}$$

Question 20

Which Gestalt principle explains why we group objects that are close together?

Accepted Answer

Proximity

Sensation and Perception: Key Concepts and Processes

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